C. Cattuto, D. Benz, A. Hotho, und G. Stumme. The Semantic Web -- ISWC 2008, Volume 5318 von Lecture Notes in Computer Science, Seite 615--631. Berlin/Heidelberg, Springer, (2008)
S. Bloehdorn, O. Görlitz, S. Schenk, und M. Völkel. Proceedings of the 6th International Conference on Knowledge Management (I-KNOW 06), Graz, Austria, (September 2006)
D. Gifford, P. Jouvelot, M. Sheldon, und J. O'Toole. Proceedings of the 13th ACM Symposium on Operating Systems Principles, 25, Seite 16-25. Pacific Grove, California, United States, ACM Press, (1991)