Elisabetta Di Nitto Massimiliano Di Penta Alessio Gambi Gianluca Ripa Maria Luisa Villani Negotiation of Service Level Agreements: An Architecture and a Search-Based Approach. 295-306 2007 conf/icsoc/2007 ICSOC http://dx.doi.org/10.1007/978-3-540-74974-5_24 db/conf/icsoc/icsoc2007.html#NittoPGRV07