Sergio Andreozzi Paolo Ciancarini Danilo Montesi Rocco Moretti Towards a Language for a Satisfaction-Based Selection of Grid Services. 723-730 2005 conf/ppam/2005 PPAM http://dx.doi.org/10.1007/11752578_87 db/conf/ppam/ppam2005.html#AndreozziCMM05