S. Auer, C. Bizer, G. Kobilarov, J. Lehmann, R. Cyganiak, und Z. Ives. Proceedings of the 6th International Semantic Web Conference (ISWC), Volume 4825 von Lecture Notes in Computer Science, Seite 722--735. Springer, (2008)
B. Grau, I. Horrocks, Y. Kazakov, und U. Sattler. IJCAI'07: Proceedings of the 20th international joint conference on Artifical intelligence, Seite 298--303. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2007)
Y. Yang, und J. Calmet. Computational Intelligence for Modelling, Control and Automation, 2006 and International Conference on Intelligent Agents, Web Technologies and Internet Commerce, International Conference on, Seite 127-127. (2006)