@article {838,
	title = {Towards bridging two cell-inspired models: P systems and R systems},
	journal = {Theoretical Computer Science},
	volume = {429},
	year = {2012},
	pages = {258-264},
	publisher = {Elsevier},
	address = {Amsterdam (The Netherlands)},
	abstract = {We examine, from the point of view of membrane computing, the two basic assumptions of reaction systems, the {\textquotedblleft}threshold{\textquotedblright} and {\textquotedblleft}no permanence{\textquotedblright} ones. In certain circumstances (e.g., defining the successful computations by local halting), the second assumption can be incorporated in a transition P system or in a symport/antiport P system without losing the universality. The case of the first postulate remains open: the reaction systems deal, deterministically, with finite sets of symbols, which is not of much interest for computing; three ways to introduce nondeterminism are suggested and left as research topics.},
	keywords = {Membrane computing, P system, Reaction system (R system), Universality},
	issn = {0304-3975},
	doi = {http://dx.doi.org/10.1016/j.tcs.2011.12.046},
	url = {http://www.sciencedirect.com/science/article/pii/S0304397511010127},
	author = {Gheorghe Paun and Mario J. P{\'e}rez-Jim{\'e}nez}
}
