Jarmo Toivonen Ari Visa Tomi Vesanen Barbro Back Hannu Vanharanta Validation of Text Clustering Based on Document Contents. 184-195 2001 conf/mldm/2001 MLDM http://link.springer.de/link/service/series/0558/bibs/2123/21230184.htm db/conf/mldm/mldm2001.html#ToivonenVVBV01