K. Myers, M. Kearns, S. Singh, und M. Walker. Proceedings of ICML-00, 17th International Conference on Machine Learning, Stanford, USA, Morgan Kaufmann Publishers, (2000)
A. Hotho, S. Staab, und G. Stumme. Principles of Data Mining and Knowledge Discovery, 7th European Conference, PKDD 2003, Dubrovnik, Croatia, September 22-26, 2003, Seite 217-228. Springer, (September 2003)
B. Lauser, und A. Hotho. Proc. of the 7th European Conference in Research and Advanced Technology for Digital Libraries, ECDL 2003, 2769, Seite 140-151. Springer, (2003)