Marco Comerio Flavio De Paoli Simone Grega Andrea Maurino Carlo Batini WSMoD: A Methodology for QoS-Based Web Services Design. 33-60 2007 4 Int. J. Web Service Res. 2 http://www.igi-pub.com/articles/details.asp?ID=6788 db/journals/jwsr/jwsr4.html#ComerioPGMB07