@article {, title = {Solving numerical NP-complete problems using P systems with active membranes: the Partition problem and beyond}, journal = {Second Annual Meeting of Project Molconet}, year = {2003}, month = {November 27-29}, pages = {1-6}, address = {Viena, Austria}, attachments = {http://cantor.cs.us.es/files/Solving Numerical NP- Complete problems.pdf}, 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} }