1. A survey of basic net models and modular net classes;Bernardinello,1992
2. Partial order behaviour and structure of Petri nets;Best;Formal Aspects Comput.,1990
3. Nonsequential Processes — a Petri Net View;Best,1988
4. Some classes of live and save Petri nets;Best,1987
5. Complexity results for 1-safe nets;Cheng,1993