Artificial and Mathematical Theory of Computation: Papers in Honor of John McCarthy

Logic Programming: 20th International Conference, ICLP 2004, Saint-Malo, France, September 6-10, 2004, Proceedings

Logic Programming and Nonmonotonic Reasoning: 7th International Conference, LPNMR 2004, Fort Lauderdale, FL, USA, January 6-8, 2004, Proceedings