@article {264, title = {Further Twenty Six Open Problems in Membrane Computing}, journal = {Third Brainstorming Week on Membrane Computing}, year = {2005}, month = {1/31/05/-2/4/05}, pages = {249-262}, publisher = {F{\'e}nix Editora}, address = {Sevilla, Espa{\~n}a}, isbn = {84-609-6771-9}, attachments = {http://cantor.cs.us.es/files/Further twenty six open problems in Membrane Computing.pdf}, author = {Gheorghe Paun}, editor = {Miguel A. Guti{\'e}rrez-Naranjo and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Francisco J. Romero-Campero and Dragos Sburlan} }