Hotho, A and Staab, S. and Stumme, G.. Wordnet improves text document clustering. Proc. SIGIR Semantic Web Workshop. Toronto, Year 2003.
Hotho, Andreas and Staab, Steffen and Stumme, Gerd. Ontologies improve text document clustering. Proceedings of the 2003 IEEE International Conference on Data Mining. 541-544 (Poster, IEEE Computer Society, Melbourne, Florida, Year 2003.