Pavel Makagonov Mikhail Alexandrov Alexander F. Gelbukh Clustering Abstracts Instead of Full Texts. 129-136 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3206&spage=129 2004 conf/tsd/2004 TSD db/conf/tsd/tsd2004.html#MakagonovAG04