R. Freund, M. Oswald, L. Staiger:
"ω-P automata with Communication Rules";
Talk: Workshop on Membrane Computing, Tarragona, Spain; 2003-07-17 - 2003-07-22; in: "Preproceedings of the Workshop on Membrane Computing", (2003), 252 - 265.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04404619