Matthias Brill Werner Damm Jochen Klose Bernd Westphal Hartmut Wittke Live Sequence Charts: An Introduction to Lines, Arrows, and Strange Boxes in the Context of Formal Verification. 374-399 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3147&spage=374 2004 conf/dfg/2004 SoftSpez Final Report db/conf/dfg/softspez2004.html#BrillDKWW04