1. Lecture Notes in Computer Science;S Abiteboul,1988
2. Asirelli, P., de Santis, M., Martelli, M.: Integrity constraints for logic databases. J. Log. Program. 2(3), 221–232 (1985)
3. Brewka, G., Eiter T.: Equilibria in heterogeneous nonmonotonic multi-context systems. In: AAAI, pp. 385–390. AAAI Press (2007)
4. Brewka, G., Eiter, T., Fink, M., Weinzierl, A.: Managed multi-context systems. In: IJCAI, pp. 786–791. IJCAI/AAAI (2011)
5. Lecture Notes in Computer Science;L Caroprese,2006