Gianfranco Ciardo, Gerald Lüttgen, Andy Jinqing Yu. Improving Static Variable Orders Via Invariants. In Jetty Kleijn, Alexandre Yakovlev, editors, Petri Nets and Other Models of Concurrency - ICATPN 2007, 28th International Conference on Applications and Theory of Petri Nets and Other Models of Concurrency, ICATPN 2007, Siedlce, Poland, June 25-29, 2007, Proceedings. Volume 4546 of Lecture Notes in Computer Science, pages 83-103, Springer, 2007. [doi]