Tetsuya Yoshida Daiki Shinkai Shogo Nishida A document retrieval support system with term relationship. 171-182 2005 3 Web Intelligence and Agent Systems 3 http://iospress.metapress.com/openurl.asp?genre=article&issn=1570-1263&volume=3&issue=3&spage=171 db/journals/wias/wias3.html#YoshidaSN05