@article {,
	title = {A Case Study in (Mem)brane Computation: Generating {N^2 / N>=1}},
	journal = {Fourth Brainstorming Week on Membrane Computing },
	volume = {I},
	year = {2006},
	month = {1/30/06-2/3/06},
	pages = {81-97},
	publisher = {F{\'e}nix Editora},
	address = {Sevilla, Espa{\~n}a},
	isbn = {84-611-0520-6 },
	author = {Nadia Busi and Miguel A. Guti{\'e}rrez-Naranjo},
	editor = {Miguel A. Guti{\'e}rrez-Naranjo and Gheorghe Paun and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Francisco J. Romero-Campero}
}
