Olivier Perrin Franck Wynen Julia Bitcheva Claude Godart A Model to Support Collaborative Work in Virtual Enterprises. 104-119 2003 conf/bpm/2003 Business Process Management http://link.springer.de/link/service/series/0558/bibs/2678/26780104.htm db/conf/bpm/bpm2003.html#PerrinWBG03