Macías-Ramos, L. F., Martínez-del-Amor M. A., Paun G., Riscos-Núñez A., & Valencia-Cabrera L.  (2014).??Proceedings of the Twelfth Brainstorming Week on Membrane Computing.  Twelfth Brainstorming Week on Membrane Computing (BWMC2014).  X+352.