R. Freund, M. Oswald, Gh. Paun:
"Control Mechnisms for Obtaining Comutational Completeness";
Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "Proceedings of The 14th International Conferense on Membrane Computing, CMC 14, Chisinau, Moldova", Chisinau (2013), ISBN: 978-9975-4237-2-4; 317 - 321.