@article {1951,
	title = {Preface},
	journal = {Natural Computing},
	volume = {15},
	year = {2016},
	pages = {519-520},
	issn = {1572-9796},
	doi = {10.1007/s11047-016-9568-z},
	url = {http://link.springer.com/article/10.1007/s11047-016-9568-z/fulltext.html},
	author = {Marian Gheorghe and Gheorghe Paun and Mario J. P{\'e}rez-Jim{\'e}nez and Agust{\'\i}n Riscos-N{\'u}{\~n}ez}
}
