Olaf Kummer Frank Wienberg Michael Duvigneau Jörn Schumacher Michael Köhler Daniel Moldt Heiko Rölke Rüdiger Valk An Extensible Editor and Simulation Engine for Petri Nets: Renew. 484-493 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3099&spage=484 2004 conf/apn/2004 ICATPN db/conf/apn/icatpn2004.html#KummerWDSKMRV04