1. Abiteboul, S., Hull, R., Vianu, V.: Foundations of Databases. Addison-Wesley, Reading (1995)
2. Artale, A., Calvanese, D., Kontchakov, R., Ryzhikov, V., Zakharyaschev, M.: Reasoning over extended ER models. In: Proceedings of ER, pp. 277–292 (2007)
3. Battista, G.D., Lenzerini, M.: A deductive method for entity-relationship modeling. In: Proceedings of VLDB, pp. 13–21 (1989)
4. Calì, A., Calvanese, D., Giacomo, G.D., Lenzerini, M.: Accessing data integration systems through conceptual schemas. In: Proceedings of ER, pp. 270–284 (2001)
5. Calì, A., Lembo, D., Rosati, R.: Query rewriting and answering under constraints in data integration systems. In: Proceedings of IJCAI, pp. 16–21 (2003)