Christoph Bussler Dieter Fensel Artificial Intelligence: Methodology, Systems, and Applications, 11th International Conference, AIMSA 2004, Varna, Bulgaria, September 2-4, 2004, Proceedings AIMSA Lecture Notes in Computer Science 3192 Springer 2004 3-540-22959-0 db/conf/aimsa/aimsa2004.html