1. A generalization of the procedure of Karp and Miller to well structured transition systems;Finkel,1987
2. A well-structured framework for analysing Petri net extensions;Finkel;Inform. and Comput.,2004
3. Well-structured languages;Geeraerts;Acta Inform.,2007
4. Nets with tokens which carry data;Lazic;Fund. Inform.,2008
5. The observational power of clocks;Alur,1994