Tammo van Lessen Jörg Nitzsche Marin Dimitrov Mihail Konstantinov Dimka Karastoyanova Luchesar Cekov Frank Leymann An Execution Engine for Semantic Business Processes. 200-211 2007 ICSOC Workshops http://dx.doi.org/10.1007/978-3-540-93851-4_20 conf/icsoc/2007w db/conf/icsoc/icsoc2007w.html#LessenNDKKCL07