Michele Angelaccio Andrea D'Ambrogio Berta Buttarazzi COPS - Collaborative Peer-to-Peer Information Systems Workshop Report. 55-58 2006 conf/wetice/2006 WETICE http://doi.ieeecomputersociety.org/10.1109/WETICE.2006.25 db/conf/wetice/wetice2006.html#AngelaccioDB06