Fabien Baligand Nicolas Rivierre Thomas Ledoux A Declarative Approach for QoS-Aware Web Service Compositions. 422-428 2007 conf/icsoc/2007 ICSOC http://dx.doi.org/10.1007/978-3-540-74974-5_38 db/conf/icsoc/icsoc2007.html#BaligandRL07