@article {256, title = {Simulating Avascular Tumors with Membrane Systems}, journal = {Third Brainstorming Week on Membrane Computing}, year = {2005}, month = {1/31/05-2/4/05}, pages = {185-195}, publisher = {F{\'e}nix Editora}, address = {Sevilla, Espa{\~n}a}, isbn = {84-609-6771-9}, author = {Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez and Francisco J. Romero-Campero}, editor = {Miguel A. Guti{\'e}rrez-Naranjo and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Francisco J. Romero-Campero and Dragos Sburlan} }