Michele Boreale Roberto Bruni Rocco De Nicola Michele Loreti Sessions and Pipelines for Structured Service Programming. 19-38 2008 FMOODS http://dx.doi.org/10.1007/978-3-540-68863-1_3 conf/fmoods/2008 db/conf/fmoods/fmoods2008.html#BorealeBNL08