Georg Zetzsche. Erasing in Petri Net Languages and Matrix Grammars. In Volker Diekert, Dirk Nowotka, editors, Developments in Language Theory, 13th International Conference, DLT 2009, Stuttgart, Germany, June 30 - July 3, 2009. Proceedings. Volume 5583 of Lecture Notes in Computer Science, pages 490-501, Springer, 2009. [doi]
Abstract is missing.