Andrea Calì, Domenico Lembo, Riccardo Rosati. Query rewriting and answering under constraints in data integration systems. In Georg Gottlob, Toby Walsh, editors, IJCAI-03, Proceedings of the Eighteenth International Joint Conference on Artificial Intelligence, Acapulco, Mexico, August 9-15, 2003. pages 16-21, Morgan Kaufmann, 2003.
Abstract is missing.