M. Kollingbaum, and T. Norman. Proc. of the First International Joint Conference on Autonomous Agents and Multi-Agent Systems, page 272-279. ACM Press, (2002)
S. Rudolph, J. Völker, and P. Hitzler. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 488-491. Berlin, Heidelberg, Springer-Verlag, (July 2007)
S. Agarwal, S. Handschuh, and S. Staab. Proceedings of the Second International Semantic Web Conference (ISWC
2003), Florida, USA, volume 2870 of Lecture Notes in Computer Science, page 211-226. Springer, (2003)