Bernd Grahlmann, Eike Best. PEP - More than a Petri Net Tool. In Tiziana Margaria, Bernhard Steffen, editors, Tools and Algorithms for Construction and Analysis of Systems, Second International Workshop, TACAS 96, Passau, Germany, March 27-29, 1996, Proceedings. Volume 1055 of Lecture Notes in Computer Science, pages 397-401, Springer, 1996.