A. Hotho, S. Staab, und G. Stumme. Proceedings of the 2003 IEEE International Conference on Data Mining, Seite 541-544 (Poster. Melbourne, Florida, IEEE Computer Society, (November 2003)
U. Fayyad, G. Piatetsky-Shapiro, und P. Smyth. Advances in knowledge discovery and data mining, American Association for Artificial Intelligence, Menlo Park, CA, USA, (1996)