Yuichi Kojima Hideo Itoh Hiroko Mano Yasushi Ogawa 367-372 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3237&spage=367 2003 conf/clef/2003 CLEF db/conf/clef/clef2003.html#KojimaIMO03