@article {,
	title = {On the Reachability Problem for P System with Porters},
	journal = {10th International Conference on Automata and Formal Languages},
	year = {2002},
	month = {August 13-18},
	pages = {1-3},
	address = {Debrecen, Hungr{\'\i}a},
	attachments = {http://www.gcn.us.es/biblio/misc/files/files/On the Reachability Problem for P systems with Porters.pdf},
	author = {Gheorghe Paun and Mario J. P{\'e}rez-Jim{\'e}nez and Fernando Sancho-Caparrini}
}
