“…In Membrane Computing, there is a large tradition in the study of dealing with information structured as two dimensional objects (see, e.g., (Ceterchi et al, 2003a;Ceterchi et al, 2003b;Dersanambika and Krithivasan, 2004;Krishna et al, 2001)). The main motivation for these studies is to bring together Membrane Computing and Picture Grammars.…”