@article {252,
	title = {An Approach to the degree of parallelism in P systems},
	journal = {Fourth Brainstorming Week on Membrane Computing },
	volume = {II},
	year = {2006},
	pages = {87-104},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	isbn = {84-611-0519-2},
	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},
	editor = {Carmen Graciani-D{\'\i}az and Gheorghe Paun and {\'A}lvaro Romero-Jim{\'e}nez and Fernando Sancho-Caparrini}
}
