Aphrodite Tsalgatidou George Athanasopoulos Michael Pantazoglou Interoperability Among Heterogeneous Services: The Case of Integration of P2P Services with Web Services. 79-110 2008 5 Int. J. Web Service Res. 4 http://www.igi-pub.com/articles/details.asp?ID=9663 db/journals/jwsr/jwsr5.html#TsalgatidouAP08