Massimiliano Colombo Elisabetta Di Nitto Massimiliano Di Penta Damiano Distante Maurilio Zuccalà Speaking a Common Language: A Conceptual Model for Describing Service-Oriented Systems. 48-60 2005 conf/icsoc/2005 ICSOC http://dx.doi.org/10.1007/11596141_5 db/conf/icsoc/icsoc2005.html#ColomboNPDZ05