A. Hotho, и G. Stumme. Proceedings of FGML Workshop, стр. 37-45. Special Interest Group of German Informatics Society (FGML --- Fachgruppe Maschinelles Lernen der GI e.V.), (2002)
A. Hotho, A. Maedche, и S. Staab. ICDM '01: Proceedings of the 2001 IEEE International Conference on Data Mining, стр. 607--608. Washington, DC, USA, IEEE Computer Society, (2001)