1. Comments on capabilities, limitation and correctness of Petri nets;Agerwala,1973
2. Facts in place⧸transition-Nets;Genrich;Lecture Notes in Computer Science,1978
3. Elements of general net theory;Genrich,1980
4. Semantics of concurrent systems: a modular fixed point trace approach;Mazurkiewicz,1985
5. Trace theory;Mazurkiewicz,1987