High-Level Net Processes
H. Ehrig, K. Hoffmann, J. Padberg, P. Baldan, R. Heckel, in: W. Brauer, H. Ehrig, J. Karhumäki, A. Salomaa (Eds.), Formal and Natural Computing: Essays Dedicated to Grzegorz Rozenberg, Springer, Berlin/Heidelberg, 2002, pp. 191–219.