@inproceedings{Ragone07a, 
 Author = {Azzurra Ragone and Umberto Straccia and Tommaso Di Noia and Eugenio Di 
Sciascio and Francesco M. Donini}, 
 Booktitle = {15th Italian Symposium on Advanced Database Systems (SEBD-07)}, 
 Editor = {Michelangelo Ceci and Donato Malerba and Letizia Tanca}, 
 Pages = {463--470}, 
 Title = {Extending Datalog for Matchmaking in P2P E-Marketplaces}, 
 Year = {2007}}