@article {1781, title = {Antimatter as a Frontier of Tractability in Membrane Computing}, journal = {Twelfth Brainstorming Week on Membrane Computing (BWMC2014)}, year = {2014}, pages = {155-168}, publisher = {F{\'e}nix Editora}, isbn = {978-84-940056-4-0}, url = {http://www.gcn.us.es/12bwmc_proceedings}, author = {Daniel D{\'\i}az-Pernil and Francisco Pe{\~n}a-Cantillana and Miguel A. Guti{\'e}rrez-Naranjo} }