@article {302,
	title = {A Polynomial Complexity Class in P Systems Using Membrane Division},
	journal = {Fifth International Workshop on Descriptional Complexity of Formal Systems},
	year = {2003},
	month = {12-14/07/2003},
	pages = {284-294},
	address = {Budapest (Hungary)},
	isbn = {963-311-356-3},
	author = {Mario J. P{\'e}rez-Jim{\'e}nez and {\'A}lvaro Romero-Jim{\'e}nez and Fernando Sancho-Caparrini},
	editor = {Erzsebet Csuhaj-Varj{\'u} and C. Kintala and D. Wotschke and Gy{\"o}rgy Vaszil}
}
