Kai Petersen Johannes Maria Zaha Andreas Metzger Variability-Driven Selection of Services for Service Compositions. 388-400 2007 ICSOC Workshops http://dx.doi.org/10.1007/978-3-540-93851-4_38 conf/icsoc/2007w db/conf/icsoc/icsoc2007w.html#PetersenZM07