J. Allan, und H. Raghavan. Proceedings of the 25th annual international ACM SIGIR Conference on Research and Development in Information Retrieval, Seite 307--314. ACM Press New York, NY, USA, (2002)
S. Staab, und A. Hotho. Intelligent Information Processing and Web Mining, Proceedings of the International IIS: IIPWM'03 Conference held in Zakopane, Seite 451-452. (2003)
P. Bosc, L. Lietard, und O. Pivert. PKDD '98: Proceedings of the Second European Symposium on Principles of Data Mining and Knowledge Discovery, Seite 255--263. London, UK, Springer-Verlag, (1998)
P. Cimiano, A. Hotho, und S. Staab. Proceedings of the Conference on Languages Resources and Evaluation (LREC), Lisbon, Portugal, ELRA - European Language Ressources Association, (Mai 2004)
U. Priss, und L. Old. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), Volume 4604 von Lecture Notes in Artificial Intelligence, Seite 310-320. Berlin, Heidelberg, Springer-Verlag, (Juli 2007)