@proceedings {555, title = {Proceedings of the Ninth Workshop on Membrane Computing}, journal = {Ninth Workshop on Membrane Computing}, year = {2008}, month = {28/07/2008}, pages = {V+449}, publisher = {Heriot-Watt University}, address = {Edinburgh, UK}, url = {http://www.cs.us.es/~marper/investigacion/PreProcWMC9.pdf}, author = {Pierluigi Frisco and David W. Corne and Gheorghe Paun} }