M. Halvey, и M. Keane. WWW '07: Proceedings of the 16th international conference on World Wide Web, стр. 1313--1314. New York, NY, USA, ACM Press, (2007)
A. Hotho, R. Jaeschke, C. Schmitz, и G. Stumme. The Semantic Web: Research and Applications, том 4011 из Lecture Notes in Computer Science, стр. 411-426. Heidelberg, Springer, (июня 2006)
A. Hotho, S. Staab, и G. Stumme. Proceedings of the Semantic Web Workshop of the 26th Annual International ACM SIGIR Conference on Research and Development in Informaion Retrieval (SIGIR 2003), August 1, 2003, Toronto Canada, (2003)Published Online at http://de.scientificcommons.org/608322..
A. Hotho, S. Staab, и G. Stumme. Knowledge Discovery in Databases: PKDD 2003, 7th European Conference on Principles and Practice of Knowledge Discovery in Databases, Proceedings, том 2838 из Lecture Notes in Computer Science, стр. 217-228. Springer, (2003)