Membrane Computing 12th International Conference, CMC 2011, Fontainebleau, France, August 23-26, 2011, Revised Selected Papers - Gheorghe, Marian; Păun, Gheorghe; Rozenberg, Grzegorz; Salomaa, Arto; Verlan, Sergey (Springer Berlin Heidelberg : Imprint: Springer, 2012)