@article {1781,
	title = {Antimatter as a Frontier of Tractability in Membrane Computing},
	journal = {Twelfth Brainstorming Week on Membrane Computing (BWMC2014)},
	year = {2014},
	pages = {155-168},
	publisher = {F{\'e}nix Editora},
	isbn = {978-84-940056-4-0},
	url = {http://www.gcn.us.es/12bwmc_proceedings},
	author = {Daniel D{\'\i}az-Pernil and Francisco Pe{\~n}a-Cantillana and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {1780,
	title = {Self-constructing Recognizer P Systems},
	journal = {Twelfth Brainstorming Week on Membrane Computing (BWMC2014)},
	year = {2014},
	pages = {137-154},
	publisher = {F{\'e}nix Editora},
	isbn = {978-84-940056-4-0},
	url = {http://www.gcn.us.es/12bwmc_proceedings},
	author = {Daniel D{\'\i}az-Pernil and Francisco Pe{\~n}a-Cantillana and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {957,
	title = {Studying the Chlorophyll Fluorescence in Cyanobacteria with Membrane Computing Techniques},
	journal = {Eleventh Brainstorming Week on Membrane Computing (11BWMC)},
	year = {2013},
	month = {08/2013},
	pages = {9-24},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	abstract = {In this paper, we report a pioneer study of the decrease in chlorophyll 
uorescence
produced by the reduction of MTT (a dimethyl thiazolyl diphenyl tetrazolium
salt) monitored using an epi
uorescence microscope coupled to automate image analysis
in the framework of P systems. Such analysis has been performed by a family of tissue
P systems working on the images as data input.},
	isbn = {978-84-940691-9-2},
	url = {http://www.gcn.us.es/files/11bwmc/009_ardelean_diaz.pdf},
	author = {Ioan Ardelean and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Francisco Pe{\~n}a-Cantillana and Iris Sarchizian}
}
@article {D{\'\i}azPernil2013846,
	title = {Segmenting images with gradient-based edge detection using Membrane Computing},
	journal = {Pattern Recognition Letters},
	volume = {34},
	number = {8},
	year = {2013},
	note = {<ce:title id="tt005">Computer Analysis of Images and Patterns</ce:title>},
	pages = {846 - 855},
	publisher = {Elsevier},
	address = {Philadelphia, USA},
	keywords = {CUDA},
	issn = {0167-8655},
	doi = {10.1016/j.patrec.2012.10.014},
	url = {http://www.sciencedirect.com/science/article/pii/S0167865512003443},
	author = {Daniel D{\'\i}az-Pernil and Ainhoa Berciano and Francisco Pe{\~n}a-Cantillana and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {923,
	title = {Using Membrane Computing for Effective Homology},
	journal = {Applicable Algebra in Engineering, Communication and Computing},
	volume = {23},
	year = {2012},
	month = {12/2012},
	pages = {233-249},
	publisher = {Springer Verlag},
	address = {Berlin, Germany},
	abstract = {Effective Homology is an algebraic-topological method based on the computational concept of chain homotopy equivalence on a cell complex. Using this algebraic data structure, Effective Homology gives answers to some important computability problems in Algebraic Topology. In a discrete context, Effective Homology can be seen as a combinatorial layer given by a forest graph structure spanning every cell of the complex. In this paper, by taking as input a pixel-based 2D binary object, we present a logarithmic-time uniform solution for describing a chain homotopy operator ϕ for its adjacency graph. This solution is based on Membrane Computing techniques applied to the spanning forest problem and it can be easily extended to higher dimensions.},
	keywords = {Computational Algebraic Topology, Digital Topology, Effective Homology, Membrane computing, Tissue-like P systems},
	issn = {0938-1279},
	doi = {10.1007/s00200-012-0176-6 },
	url = {http://link.springer.com/article/10.1007\%2Fs00200-012-0176-6},
	author = {Hepzibah A. Christinal and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Pedro  Real}
}
@article {875,
	title = {Parallel Skeletonizing of Digital Imagery by Using Cellular Automata},
	journal = {Lecture Notes in Computer Science},
	volume = {7309 },
	year = {2012},
	month = {05/2012},
	pages = {39-48},
	publisher = {Springer Verlag},
	address = {Bertinoro, Italy},
	issn = {0302-9743},
	url = {http://ctic2012.dm.unibo.it/},
	author = {Francisco Pe{\~n}a-Cantillana and Antonio Berciano and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo},
	editor = {M. Ferri and P. Frosini and C. Landi and A. Cerri and B. Di-Fabio}
}
@article {867,
	title = {Cell Complexes and Membrane Computing for Thinning 2D and 3D Images},
	journal = {Tenth Brainstorming Week on Membrane Computing},
	volume = {II},
	year = {2012},
	month = {02/2012},
	pages = {167-186},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {In this paper, we show a new example of bridging Algebraic Topology,
Membrane Computing and Digital Images. In [24], a new algorithm for thinning multi-
dimensional black and white digital images by using cell complexes was presented. Such
cell complexes allow a discrete partition of the space and the algorithm preserves topolog-
ical and geometrical properties of the image. In this paper, we present a parallel adapta-
tion of such algorithm to P systems, by introducing some concepts of Algebraic Topology
in the Membrane Computing framework. The chosen model for the implementation is
tissue-like P systems with promoters, inhibitors and priorities.},
	url = {http://www.gcn.us.es/10BWMC/10BWMCvolII/papers/MCThinning_bwmc.pdf},
	author = {Ra{\'u}l Reina-Molina and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {857,
	title = {Counting Cells with Tissue-like P Systems},
	journal = {Tenth Brainstorming Week on Membrane Computing},
	volume = {I},
	year = {2012},
	month = {02/2012},
	pages = {69-78},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {Counting the number of cells obtained in an experiment is crucial in many
areas in Biology. Nonetheless, this is usually performed by hand by the researcher due the
intrinsic difficulty of the task. In this paper, we present a set of techniques for counting
cells inspired in the treatment of Digital Images via tissue-like P systems with promoters.},
	url = {http://www.gcn.us.es/10BWMC/10BWMCvolI/papers/counting_cells_bwmc.pdf},
	author = {Ioan Ardelean and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Francisco Pe{\~n}a-Cantillana and Ra{\'u}l Reina-Molina and Iris Sarchizian}
}
@article {858,
	title = {Skeletonizing Images by Using Spiking Neural P Systems},
	journal = {Tenth Brainstorming Week on Membrane Computing},
	volume = {I},
	year = {2012},
	month = {02/2012},
	pages = {91-110},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {Skeletonizing an image is representing a shape with a small amount of information by converting the initial image into a more compact representation and keeping
the meaning features. In this paper we use spiking neural P systems to solve this problem.
Based on such devices, a parallel software has been implemented on the GPU architecture. Some real-world applications and open lines for future research are also presented.},
	url = {http://www.gcn.us.es/10BWMC/10BWMCvolI/papers/skel_snps_bwmc.pdf},
	author = {Daniel D{\'\i}az-Pernil and Francisco Pe{\~n}a-Cantillana and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {881,
	title = {Designing a New Software Tool for Digital Imagery Based on P Systems},
	journal = {Natural Computing},
	volume = {11},
	year = {2012},
	pages = {381-386},
	publisher = {Springer Verlag},
	address = {Amsterdam, Netherlands},
	abstract = {In this paper we present a new software tool for dealing with the problem of segmentation in Digital
Imagery. The implementation is inspired in the design of a tissue-like P system which solves the problem in constant
time due the intrinsic parallelism of Membrane Computing devices.},
	keywords = {Digital imaginery, Membrane computing, Segmentation},
	issn = {1567-7818},
	doi = {10.1007/s11047-011-9287-4},
	url = {http://www.springer.com/computer/theoretical+computer+science/journal/11047},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Helena Molina-Abril and Pedro  Real}
}
@article {874,
	title = {Parallel Skeletonizing of Digital Imagery by Using Cellular Automata},
	journal = {Lecture Notes in Computer Science},
	volume = {7309 },
	year = {2012},
	pages = {39-48},
	publisher = {Springer},
	address = {Amsterdam, The Netherlands},
	issn = {0302-9743},
	author = {Francisco Pe{\~n}a-Cantillana and Antonio Berciano and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {723,
	title = {A New Way to Obtain Homology Groups in Binary 2D Images Using Membrane Computing},
	journal = {XII Encuentro de Algebra Computacional y Aplicaciones EACA 2010},
	year = {2011},
	month = {07/2010},
	pages = {107-112},
	publisher = {Universidade de Santiago de Compostela Publicaci{\'o}ns},
	address = {Santiago de Compostela, Spain},
	isbn = {978-84-9887-518-8 },
	url = {http://www.usc.es/regaca/eaca2010/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Pedro  Real and Vanesa S{\'a}nchez-Canales}
}
@article {718,
	title = {Computation of Rumsey numbers by P systems with active membranes},
	journal = {International Journal of Foundations of Computer Science},
	volume = {22},
	year = {2011},
	month = {06/2011},
	pages = {29-38},
	publisher = {World Scientific},
	address = {London, U.K.},
	issn = {0129-0541},
	author = {Linqiang Pan and Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {760,
	title = {Designing Tissue-like P Systems for Image Segmentation on Parallel Architectures},
	journal = {Ninth Brainstorming Week on Membrane Computing},
	year = {2011},
	month = {02/2011},
	pages = {43-62},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {Problems associated with the treatment of digital images have several in-
teresting features from a bio-inspired point of view. One of them is that they can be
suitable for parallel processing, since the same sequential algorithm is usually applied in
different regions of the image. In this paper we report a work-in-progress of a hardware
implementation in Field Programmable Gate Arrays (FPGAs) of a family of tissue-like
P systems which solves the segmentation problem in digital images.},
	url = {http://www.gcn.us.es/9BWMC/volume/03tissue_fpga.pdf},
	author = {Javier Carnero and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {764,
	title = {Integer Linear Programming for Tissue-like P Systems},
	journal = {Ninth Brainstorming Week on Membrane Computing},
	year = {2011},
	month = {02/2011},
	pages = {343-353},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {In this paper we report a work-in-progress whose {\textasciimacron}nal target is the imple-
mentation of tissue-like P system in a cluster of computers which solves some instances
of the segmentation problem in 2D Digital Imagery. We focus on the theoretical aspects
and the problem of choosing a maximal number of application of rules by using Integer
Linear Programming techniques. This study is on the basis of a future distribution of the
parallel work among the processors.},
	url = {http://www.gcn.us.es/9BWMC/volume/25Miguelilp-for-tlp.pdf},
	author = {Ra{\'u}l Reina-Molina and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {765,
	title = {Smoothing Problem in 2D Images with Tissue-like P Systems and Parallel Implementation},
	journal = {Ninth Brainstorming Week on Membrane Computing},
	year = {2011},
	month = {02/2011},
	pages = {317-328},
	publisher = {F{\'e}nix Editora},
	address = {Seville, Spain},
	abstract = {Smoothing is often used in Digital Imagery to reduce noise within an image.
In this paper we present a Membrane Computing algorithm for smoothing 2D images in
the framework of tissue-like P systems. The algorithm has been implemented by using a
novel device architecture called CUDATM, (Compute Uni{\textasciimacron}ed Device Architecture). We
present some examples, compare the obtained time and present some research lines for
the future.},
	url = {http://www.gcn.us.es/9BWMC/volume/23smoothing_v5.pdf},
	author = {Francisco Pe{\~n}a-Cantillana and Daniel D{\'\i}az-Pernil and Hepzibah A. Christinal and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {783,
	title = {Implementation on CUDA of the Smoothing Problem with Tissue-Like P Systems},
	journal = {International Journal of Natural Computing Research},
	volume = {2},
	year = {2011},
	pages = {25-34},
	publisher = {IGI Global},
	address = {Hershey, Pennsylvania (USA)},
	abstract = {Smoothing is often used in Digital Imagery for improving the quality of an image by reducing its level of noise. This paper presents a parallel implementation of an algorithm for smoothing 2D images in the framework of Membrane Computing. The chosen formal framework has been tissue-like P systems. The algorithm has been implemented by using a novel device architecture called CUDA (Compute Unified Device Architecture) which allows the parallel NVIDIA Graphics Processors Units (GPUs) to solve many complex computational problems. Some examples are presented and compared; research lines for the future are also discussed.},
	issn = {1947-928X},
	doi = {10.4018/jncr.2011070103},
	url = {http://www.igi-global.com/bookstore/article.aspx?titleid=58064},
	author = {Francisco Pe{\~n}a-Cantillana and Daniel D{\'\i}az-Pernil and Hepzibah A. Christinal and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {777,
	title = {A Parallel Implementation of the Thresholding Problem by Using Tissue-Like P Systems},
	journal = {Lecture Notes in Computer Science},
	volume = {6855 },
	year = {2011},
	pages = {277-284},
	publisher = {Springer},
	address = {Amsterdam, The Netherlands},
	issn = {0302-9743},
	url = {http://congreso.us.es/caip2011/},
	author = {Francisco Pe{\~n}a-Cantillana and Daniel D{\'\i}az-Pernil and Ainhoa Berciano and Miguel A. Guti{\'e}rrez-Naranjo}
}
@article {664,
	title = {A Bio-inspired Software for Segmenting Digital Images},
	journal = {2010 IEEE Fifth International Conference on Bio-Inspired Computing: Theories and Applications BIC-TA},
	volume = {2},
	year = {2010},
	month = {09/2010},
	pages = {1377-1381 },
	publisher = {IEEE, Inc.},
	address = {Liverpool, UK},
	isbn = {978-1-4244-6438-8},
	url = {http://bic-ta.hnu.cn/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Helena Molina-Abril and Pedro  Real},
	editor = {Atulya Nagar and R. Thamburaj and K. Li and Z. Tang and R. Li}
}
@article {671,
	title = {Computing Homology Groups in Binary 2D Imagery by Tissue-like P Systems},
	journal = {Romanian Journal of Information Science and Technology},
	volume = {13},
	year = {2010},
	month = {09/2010},
	pages = {141-152},
	publisher = {EDITURA ACADEMIEI ROM{\^A}NE},
	address = {Bucure{\c s}ti, Rom{\^a}nia},
	abstract = {We present a new solution for the Homology Groups of Binary 2D Image (HGB2I) Problem by using Membrane Computing techniques. This is a classical problem in Homology Theory which tries to calculate the number of connected components and the representative curves of the holes of these components from a given binary 2D image. To this aim, we present a family of P systems which solves all the instances of the problem in the framework of Tissue-like P systems with catalysts. This is a new framework which combines the membrane structure and symport-antiport communication rules of tissue-like P systems with the power of catalysts.},
	issn = {1453-8245},
	url = {http://www.imt.ro/romjist/Volum13/Number13_2/abstracts.htm$\#$4},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Pedro  Real and Vanesa S{\'a}nchez-Canales}
}
@article {682,
	title = {Solving Sudoku with Membrane Computing},
	journal = {2010 IEEE Fifth International Conference on Bio-Inspired Computing: Theories and Applications BIC-TA},
	volume = {I},
	year = {2010},
	month = {09/2010},
	pages = {610-615 },
	publisher = {IEEE, Inc.},
	address = {Changsha, China},
	isbn = {978-1-4244-6438-8},
	url = {http://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=16823},
	author = {Daniel D{\'\i}az-Pernil and Carlos M. Fern{\'a}ndez-M{\'a}rquez and Manuel Garc{\'\i}a-Quismondo and Miguel A. Guti{\'e}rrez-Naranjo and Miguel A. Mart{\'\i}nez-del-Amor},
	editor = {K. Li and Z. Tang and R. Li and Atulya Nagar and R. Thamburaj}
}
@article {670,
	title = {Thresholding of 2D Images with Cell-like P Systems},
	journal = {Romanian Journal of Information Science and Technology},
	volume = {13},
	year = {2010},
	month = {09/2010},
	pages = {131-140},
	publisher = {EDITURA ACADEMIEI ROM{\^A}NE},
	address = {Bucure{\c s}ti, Rom{\^a}nia},
	abstract = {Thresholding is the process of splitting a digital image into sets of pixels in order to make it easier to analyze. Pixels are ordered according to a scale of one of their features as brightness or color and the final image is obtained by comparing the measure of the feature with some thresholds. In this paper we present a family of cell-like P systems which solve the thresholding problem in linear time on the number of pixels},
	issn = {1453-8245},
	url = {http://www.imt.ro/romjist/Volum13/Number13_2/abstracts.htm$\#$3},
	author = {Hepzibah A. Christinal and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {517,
	title = {A linear-time solution to the Partition problem in a cellular tissue-like model},
	journal = {Journal of Computational and Theoretical Nanoscience},
	volume = {7},
	year = {2010},
	month = {05/2010},
	pages = {884-889},
	publisher = {American Scientific Publishers},
	issn = {1936-6612},
	url = {http://www.aspbs.com/ctn/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {637,
	title = {Array Tissue-like P Systems},
	journal = {Eighth Brainstorming  Week on Membrane Computing},
	year = {2010},
	month = {02/2010},
	pages = {37-52},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	url = {http://www.gcn.us.es/8BWMC/volume/03array_tps_sevilla.pdf},
	attachments = {http://www.gcn.us.es/biblio/files/files/03array_tps_sevilla.pdf},
	author = {Hepzibah A. Christinal and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {634,
	title = {A Cellular Sudoku Solver},
	journal = {Eighth Brainstorming  Week on Membrane Computing},
	year = {2010},
	month = {02/2010},
	pages = {77-88},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	isbn = {978-84-614-2357-6},
	url = {http://www.gcn.us.es/8BWMC/volume/06sudokuMiguel.pdf},
	attachments = {http://www.gcn.us.es/biblio/files/files/06sudokuMiguel.pdf},
	author = {Daniel D{\'\i}az-Pernil and Carlos M. Fern{\'a}ndez-M{\'a}rquez and Manuel Garc{\'\i}a-Quismondo and Miguel A. Guti{\'e}rrez-Naranjo and Miguel A. Mart{\'\i}nez-del-Amor}
}
@article {635,
	title = {A Cellular Way to Obtain Homology Groups in Binary 2D Images},
	journal = {Eighth Brainstorming  Week on Membrane Computing},
	year = {2010},
	month = {02/2010},
	pages = {89-100},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	isbn = {978-84-614-2357-6},
	url = {http://www.gcn.us.es/8BWMC/volume/07homol_br.pdf},
	attachments = {http://www.gcn.us.es/biblio/files/files/07homol_br.pdf},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Pedro  Real and Vanesa S{\'a}nchez-Canales}
}
@article {642,
	title = {Tissue-like P Systems without Environment},
	journal = {Eighth Brainstorming  Week on Membrane Computing},
	year = {2010},
	month = {02/2010},
	pages = {53-64},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	isbn = {978-84-614-2357-6},
	url = {http://www.gcn.us.es/8BWMC/volume/04DiazPernilEnvironment.pdf},
	attachments = {http://www.gcn.us.es/biblio/files/files/04DiazPernilEnvironment.pdf},
	author = {Hepzibah A. Christinal and Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {523,
	title = {Software for P systems},
	journal = {The Oxford Handbook of Membrane Computing},
	year = {2010},
	pages = {437-454},
	publisher = {Oxford University Press},
	chapter = {17},
	address = {Oxford (U.K.)},
	isbn = {9780199556670},
	url = {http://www.us.oup.com/us/catalog/general/subject/Mathematics/ComputerScience/?view=usa\&sf=toc\&ci=9780199556670},
	author = {Daniel D{\'\i}az-Pernil and Carmen Graciani-D{\'\i}az and Miguel A. Guti{\'e}rrez-Naranjo and Ignacio P{\'e}rez-Hurtado and Mario J. P{\'e}rez-Jim{\'e}nez},
	editor = {Gheorghe Paun and Grzegorz Rozenberg and Arto Salomaa}
}
@article {498,
	title = {Efficient simulation of tissue-like P systems by transition cell-like P systems},
	journal = {Natural Computing},
	volume = {8},
	year = {2009},
	month = {12/2009},
	pages = {797-806},
	publisher = {Springer Verlag},
	address = {Amsterdam, Netherlands},
	abstract = {In the framework of P systems, it is known that the construction of exponential number of objects in polynomial time is not enough to efficiently solve NP-complete problems. Nonetheless, it could be sufficient to create an exponential number of membranes in polynomial time. Working with P systems whose membrane structure does not increase in size, it is known that it is not possible to solve computationally hard problems (unless P = NP), basically due to the impossibility of constructing exponential number of membranes, in polynomial time, using only evolution, communication and dissolution rules. In this paper we show how a family of recognizer tissue P systems with symport/antiport rules which solves a decision problem can be efficiently simulated by a family of basic recognizer P systems solving the same problem. This simulation allows us to transfer the result about the limitations in computational power, from the model of basic cell-like P systems to this kind of tissue-like P systems.},
	issn = {1567-7818 },
	doi = {10.1007/s11047-008-9102-z},
	url = {http://dx.doi.org/10.1007/s11047-008-9102-z},
	author = {Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez and {\'A}lvaro Romero-Jim{\'e}nez}
}
@article {448,
	title = {Descriptional complexity of tissue-like P systems with cell division},
	journal = {Lecture Notes in Computer Science},
	volume = {5715},
	year = {2009},
	month = {09/2009},
	pages = {168-178},
	publisher = {Springer Berlin / Heidelberg},
	abstract = {In this paper we address the problem of describing the complexity of the evolution of a tissue-like P system with cell division. In the computations of such systems the number of (parallel) steps is not sufficient to evaluate the complexity. Following this consideration, Sevilla Carpets were introduced as a tool to describe the space-time complexity of P systems.
Sevilla Carpets have already been used to compare two different solutions of the Subset Sum problem (both designed in the framework of P systems with active membranes) running on the same instance. In this paper we extend the comparison to the framework of tissue-like P systems with cell division.
},
	isbn = {978-3-642-03744-3},
	doi = {10.1007/978-3-642-03745-0_21},
	url = {http://www.springerlink.com/content/u40g73212807k276/},
	author = {Daniel D{\'\i}az-Pernil and Pilar Gallego-Ortiz and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {491,
	title = {Solving the independent Set problem by using tissue-like P systems with cell division},
	journal = {Methods and Models in Artificial and Natural Computation},
	volume = {5601},
	year = {2009},
	note = {A Homage to Professor Mira{\textquoteright}s Scientific Legacy. Lecture Notes on Computer Science},
	month = {06/2009},
	pages = {213-222},
	publisher = {Springer Berlin / Heidelberg},
	abstract = {Tissue-like P systems with cell division is a computing model in the framework of Membrane Computing inspired by the intercellular communication and neuronal synaptics. It considers the cells as unit processors and the computation is performed by the parallel application of given rules. Division rules allow an increase of the number of cells during the computation. We present a polynomial-time solution for the Independent Set problem via a uniform family of such systems.},
	isbn = {978-3-642-02263-0},
	doi = {10.1007/978-3-642-02264-7},
	url = {http://www.springerlink.com/content/4k32v721u7725mx7/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {459,
	title = {Cell-like versus tissue-like P systems by means of Sevilla Carpets },
	journal = {7th Brainstorming Week on Membrane Computing},
	volume = {I},
	year = {2009},
	month = {02/02/2009},
	pages = {109-121},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	abstract = {Sevilla Carpets are a handy tool for comparing computations performed
by different systems solving the same problem. Such Sevilla Carpets provide on one
hand quantitative information through parameters such as Weight, Surface and Average
weight, and on the other hand they also provide a fast glimpse on the complexity of the
computation thanks to their graphical representation.
   Up to now, Sevilla Carpets were only used on Cell-like P systems. In this paper
we present a first comparison by means of Sevilla Carpets of the computations of three
P systems (designed within different models), all of them solving the same instance of
the Subset Sum problem. Two of these solutions use Cell-like P systems with active
membranes, while the third one uses Tissue-like P systems with cell division.
},
	isbn = {978-84-613-2837-6},
	url = {http://www.gcn.us.es/?q=node/414},
	author = {Daniel D{\'\i}az-Pernil and Pilar Gallego-Ortiz and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {447,
	title = {A P-lingua programming environment for Membrane Computing},
	journal = {Lecture Notes in Computer Science},
	volume = {5391},
	year = {2009},
	month = {01/2009},
	pages = {187-203},
	publisher = {Springer Berlin / Heidelberg},
	abstract = {A new programming language for membrane computing, P-Lingua, is developed in this paper. This language is not designed for a specific simulator software. On the contrary, its purpose is to offer a general syntactic framework that could define a unified standard for membrane computing, covering a broad variety of models. At the present stage, P-Lingua can only handle P systems with active membranes, although the authors intend to extend it to other models in the near future.
P-Lingua allows to write programs in a friendly way, as its syntax is very close to standard scientific notation, and parameterized expressions can be used as shorthand for sets of rules. There is a built-in compiler that parses these human-style programs and generates XML documents that can be given as input to simulation tools, while different plugins can be designed to produce specific adequate outputs for existing simulators.
Furthermore, we present in this paper an integrated development environment that plays the role of an interface where P-Lingua programs can be written and compiled. We also present a simulator for the class of recognizer P systems with active membranes, and we illustrate it by following the writing, compiling and simulating processes with a family of P systems solving the SAT problem.},
	isbn = {978-3-540-95884-0},
	doi = {10.1007/978-3-540-95885-7_14},
	url = {http://www.springerlink.com/content/74177526wg3p7j1j/},
	author = {Daniel D{\'\i}az-Pernil and Ignacio P{\'e}rez-Hurtado and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {347,
	title = {A P-lingua programming environment for Membrane Computing},
	journal = {9th Workshop on Membrane Computing},
	year = {2008},
	month = {July 28-31, 2008},
	pages = {187-203},
	address = {Edinburgh, The U.K.},
	author = {Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez and Ignacio P{\'e}rez-Hurtado}
}
@article {,
	title = {A Fast Solution to the Partition Problem by Using Tissue-Like P Systems},
	journal = {Third International Conference on Bio-Inspired Computing},
	year = {2008},
	month = {9/28-10/1, 2008},
	pages = {43 - 47},
	edition = {University of South Australia IEEE Catalog Number CFP0801F-PRT},
	address = {Adelaide, Australia},
	isbn = {978-1-4244-2724-6},
	url = {http://www.bic-ta.org/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez},
	editor = {D. Kearney and V. Nguyen and G. Gioiosa and T. Hendtlass}
}
@article {355,
	title = {A uniform family of tissue P systems with cell division solving 3-COL in a linear time},
	journal = {Theoretical Computer Science},
	volume = {404},
	year = {2008},
	month = {09/2008},
	pages = {76-87},
	publisher = {Elsevier},
	address = {Amsterdam (The Netherlands)},
	abstract = {Several examples of the efficiency of cell-like P systems regarding the solution of NP-complete problems in polynomial time can be found in the literature(obviously, trading space for time). Recently, different new models of tissue-like P systems have received much attention from the scientific community. In this paper we present a linear-time solution to an NP-complete problem from graph theory, the 3-coloring problem, and we discuss the suitability of tissue-like P systems as a framework to address the efficient solution to intractable problems.},
	keywords = {Membrane computing; Tissue P systems; Cell division; 3-coloring problem},
	issn = {0304-3975},
	doi = {10.1016/j.tcs.2008.04.005 },
	url = {http://dx.doi.org/10.1016/j.tcs.2008.04.005},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {357,
	title = {Computational Efficiency of Cellular Division in Tissue-like Membrane Systems},
	journal = {Romanian Journal of Information Science and Technology},
	volume = {11},
	year = {2008},
	pages = {229-241},
	publisher = {EDITURA ACADEMIEI ROM{\^A}NE},
	address = {Bucure{\c s}ti, Rom{\^a}nia},
	abstract = {Tissue-like P systems with cell division are computing models in the framework of membrane computing. They are inspired by the intercellular communication and neuronal synaptics, their structures being formalized by underlying graphs. As usual in membrane computing, division rules allow the construction of an exponential workspace (described by the number of cells) in a linear time. In this paper this ability is used for presenting a uniform linear{time solution for the (NP{\textendash}complete) Vertex Cover problem via a uniform family of such systems. This solution is compared to other ones obtained in the framework of cell-like membrane systems.},
	issn = {1453-8245},
	url = {http://www.imt.ro/romjist/Volum11/Number11_3/02-Diaz-Pernil.htm},
	author = {Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and {\'A}lvaro Romero-Jim{\'e}nez}
}
@article {368,
	title = {Graphics and P systems: Experiments with JPLANT},
	journal = {Proceedings of the Sixth Brainstorming Week on Membrane Computing},
	year = {2008},
	pages = {241-254},
	publisher = {F{\'e}nix Editora},
	url = {http://www.gcn.us.es/6BWMC/volume/jplant.pdf},
	author = {Elena Rivero-Gil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez},
	editor = {Daniel D{\'\i}az-Pernil and Carmen Graciani-D{\'\i}az and Miguel A. Guti{\'e}rrez-Naranjo and Gheorghe Paun and Ignacio P{\'e}rez-Hurtado and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {434,
	title = {P-Lingua: A programming language for membrane computing },
	journal = {6th Brainstorming Week on Membrane Computing},
	volume = {6},
	year = {2008},
	pages = {135-155},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	abstract = {Software development for cellular computing has already been addressed,
yielding a first generation of applications. In this paper, we develop a new programming
language: P-Lingua. Furthermore, we present a simulator for the class of recognizing P
systems with active membranes. We illustrate it by giving a solution to the SAT problem
as an example.},
	isbn = {978-84-612-44 },
	url = {http://www.gcn.us.es/6BWMC/volume/plingua.pdf},
	author = {Daniel D{\'\i}az-Pernil and Ignacio P{\'e}rez-Hurtado and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@proceedings {436,
	title = {Sixth brainstorming week on membrane computing},
	journal = {6th Brainstorming Week on Membrane Computing},
	year = {2008},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	isbn = {978-84-612-44 },
	url = {http://www.gcn.us.es/6BWMC/6BWMC_proceedings.htm},
	author = {Miguel A. Guti{\'e}rrez-Naranjo and Daniel D{\'\i}az-Pernil and Carmen Graciani-D{\'\i}az and Gheorghe Paun and Ignacio P{\'e}rez-Hurtado and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {438,
	title = {Solving the partition problem by using tissue-like P systems with cell division },
	journal = {6th Brainstorming Week on Membrane Computing},
	volume = {6},
	year = {2008},
	pages = {124-134},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Spain},
	abstract = {Tissue-like P systems with cell division is a computing model in the framework
of Membrane Computing that shares with the spiking neural P system model a
similar biological inspiration. Namely, both models are based on the intercellular communication
and cooperation between neurons, respectively. Due to this fact, in both
models the devices have the same structure: a network of elementary units (cells in a
tissue and interconnected neurons, respectively). Nonetheless, the two models are quite
different. One of the differences is the ability of tissue-like P systems with cell division
for increasing the number of cells during the computation. In this paper we exploit this
ability and present a polynomial-time solution for the (NP-complete) Partition problem
via a uniform family of such P systems.},
	isbn = {978-84-612-44 },
	url = {http://www.gcn.us.es/6BWMC/volume/agustin.pdf},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {,
	title = {A logarithmic bound for solving Subset Sum with P systems},
	journal = {Lecture Notes in Computer Science},
	year = {2007},
	note = {In G. Elefterakis, P. Kefalas, Gh. Paun, G. Rozenberg, A. Salomaa (eds.)
Revised, Selected, and Invited Papers. Lecture Notes in Computer Science, Springer-Verlag, Berlin-Heidelberg, 4860 (2007), 257-270},
	month = {June 25-28, 2007},
	pages = {257-270},
	publisher = {Springer},
	address = {Amsterdam, The Netherlands},
	abstract = {The aim of our paper is twofold. On one hand we prove the ability of polarizationless P systems with dissolution and with division rules for non-elementary membranes to solve NP-complete problems in a polynomial number of steps, and we do this by presenting a solution to the Subset Sum problem. On the other hand, we improve some similar results obtained for different models of P systems by reducing the number of steps and the necessary resources to be of a logarithmic order with respect to k (recall that n and k are the two parameters used to indicate the size of an instance of the Subset Sum problem).
As the model we work with does not allow cooperative rules and does not consider the membranes to have an associated polarization, the strategy that we will follow consists on using objects to represent the weights of the subsets through their multiplicities, and comparing the number of objects against a fixed number of membranes. More precisely, we will generate k membranes in logk steps.},
	isbn = {978-3-540-77311-5},
	issn = {0302-9743 },
	doi = {10.1007/978-3-540-77312-2_16},
	url = {http://www.springerlink.com/content/tq37h93l8p454153/},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {,
	title = {Tissue simulator: A graphical tool for tissue P systems},
	journal = {16th International Symposium on Fundamentals of Computational Theory},
	year = {2007},
	month = {August 31, 2007},
	pages = {23-34},
	edition = {MTA SZTAKI},
	address = {Budapest, Hungary},
	abstract = {Recently, different new models of tissue-like P systems have received important attention from the scientific community. This paper is focused in a concrete model: recognizing tissue P system with cell division. A software application allowing to understand better this model is presented. A linear-time solution to an NP-complete problem from graph theory, the 3{\textendash}coloring problem is considered as a case study with this tool.},
	url = {http://www.sztaki.hu/tcs/acmc07/procpage.html},
	author = {Rafael Borrego-Ropero and Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez}
}
@article {244,
	title = {A Linear Solution for Subset Sum Problem with Tissue P systems with Cell Division},
	journal = {Fifth Brainstorming Week on Membrane Computing},
	year = {2007},
	month = {1/29/07-2/2/07},
	pages = {113-130},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	isbn = {978-84-611-6776-0},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez},
	editor = {Miguel A. Guti{\'e}rrez-Naranjo and Gheorghe Paun and {\'A}lvaro Romero-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {,
	title = {A linear-time tissue P system based solution for the 3-coloring problem},
	journal = {Electronic Notes in Theoretical Computer Science },
	volume = {171},
	year = {2007},
	pages = {81-93},
	publisher = {Elsevier B.V.},
	abstract = {In the literature, several examples of the efficiency of cell-like P systems regarding the solution of NP-complete problems in polynomial time can be found (obviously, trading space for time). Recently, different new models of tissue-like P systems have received important attention from the scientific community. In this paper we present a linear-time solution to an NP-complete problem from graph theory, the 3-coloring problem, and we discuss the suitability of tissue-like P systems as a framework to address the efficient solution to intractable problems. },
	keywords = {3-coloring problem, cell division, Membrane computing, Tissue P Systems},
	doi = {10.1016/j.entcs.2007.05.009 },
	url = {http://dx.doi.org/10.1016/j.entcs.2007.05.009},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {,
	title = {Solving Subset Sum in Linear Time by Using Tissue P Systems with Cell Division},
	journal = {Lecture Notes in Computer Science},
	volume = {4527},
	year = {2007},
	pages = {170-179},
	publisher = {Springer},
	address = {Amsterdam, The Netherlands},
	abstract = {Tissue P systems with cell division is a computing model in the framework of Membrane Computing based on intercellular communication and cooperation between neurons. The ability of cell division allows us to obtain an exponential amount of cells in linear time and to design cellular solutions to NP-complete problems in polynomial time. In this paper we present a solution to the Subset Sum problem via a family of such devices. This is the first solution to a numerical NP-complete problem by using tissue P systems with cell division. 
},
	issn = {0302-9743},
	doi = {10.1007/978-3-540-73053-8},
	url = {http://www.springerlink.com/index/q64n502j641026nu.pdf},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {,
	title = {An efficient solution to 3-COL with tissue P systems},
	journal = {Workshop on Membrane Computing and Biologically Inspired Process Calculi},
	year = {2006},
	month = {July 9},
	pages = {1-12},
	address = {Venecia, Italia},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
@article {240,
	title = {Solving 3-COL with Tissue P Systems},
	journal = {Fourth Brainstorming Week on Membrane Computing },
	volume = {II},
	year = {2006},
	month = {1/30/06-2/3/06},
	pages = {17-29},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	isbn = {84-611-0519-2},
	author = {Daniel D{\'\i}az-Pernil and Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez},
	editor = {Carmen Graciani-D{\'\i}az and Gheorghe Paun and {\'A}lvaro Romero-Jim{\'e}nez and Fernando Sancho-Caparrini}
}
@article {,
	title = {Molecular programs as formal systems},
	journal = {12th International Congress of Logic, Methodology and Philosophy of Science},
	year = {2003},
	month = {August 7-13},
	pages = {160-161},
	address = {Oviedo, Espa{\~n}a},
	isbn = {84-600-9913-X},
	attachments = {http://www.gcn.us.es/biblio/files/files/Molecular Programs as Formal Systems.pdf},
	author = {Daniel D{\'\i}az-Pernil and Mario J. P{\'e}rez-Jim{\'e}nez and Antonio J. Ramos-Espina},
	editor = {E. Alvarez and R. Bosch and L. Villamil}
}
