R. Klein. http://wwwpi6.fernuni-hagen.de/Lehre/Kurse/Geometrie/demo.pdf, (April 1998)öffentliche Schnupperfassung der Kurseinheiten 1
und 2 zum Kurs~1840 der FernUniversität Hagen.
M. Halvey, and M. Keane. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 1313--1314. New York, NY, USA, ACM Press, (2007)
D. Newman, J. Lau, K. Grieser, and T. Baldwin. Human Language Technologies: The 2010 Annual Conference of the North American Chapter of the Association for Computational Linguistics, page 100--108. Los Angeles, California, Association for Computational Linguistics, (June 2010)
D. Ramage, P. Heymann, C. Manning, and H. Molina. WSDM '09: Proceedings of the Second ACM International Conference on Web Search and Data Mining, page 54--63. New York, NY, USA, ACM, (2009)
M. Rosell, V. Kann, and J. Litton. International Conference on Natural Language Processing, Allied Publishers Private Limited, pp, page 207--216. (2004)
E. Gabrilovich, and S. Markovitch. IJCAI'07: Proceedings of the 20th international joint conference on Artifical intelligence, page 1606--1611. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2007)
G. Brajnik, S. Mizzaro, and C. Tasso. SIGIR '96: Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval, page 128--136. New York, NY, USA, ACM, (1996)
A. Hotho, S. Staab, and G. Stumme. Knowledge Discovery in Databases: PKDD 2003, 7th European Conference on Principles and Practice of Knowledge Discovery in Databases, Proceedings, volume 2838 of Lecture Notes in Computer Science, page 217-228. Springer, (2003)
K. Järvelin. Proceedings of the 2nd International Conference on the Theory of Information Retrieval. Lecture Notes in Computer Science, 5766, page 289-296. Heidelberg, Springer, (2009)