@article {529,
	title = {Characterizing Tractability by Cell-Like Membrane Systems},
	journal = {Formal models, languages and applications},
	volume = {66},
	year = {2006},
	pages = {137-154},
	publisher = {World Scientific Publishing Company},
	chapter = {9},
	address = {Singapore},
	abstract = {In this paper we present a polynomial complexity class in the framework
of membrane computing. In this context, and using accepting transition
P systems, we provide a characterization of the standard computational
class P of problems solvable in polynomial time by deterministic Turing
machines.},
	isbn = {978-981-256-889-2},
	url = {http://www.worldscibooks.com/compsci/6180.html},
	author = {Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Francisco J. Romero-Campero and {\'A}lvaro Romero-Jim{\'e}nez},
	editor = {K. G. Subramanian and K. Rangarajan and M. Mukund}
}
