Toshiko Wakaki Katsumi Inoue Chiaki Sakama Katsumi Nitta 706-709 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3229&spage=706 2004 conf/jelia/2004 JELIA db/conf/jelia/jelia2004.html#WakakiISN04