_text_
http://hdl.handle.net/10232/6937
http://megalodon.jp/2011-0712-0956-17/sites.google.com/site/articlesoftsukasak/officetk/articles-since2001term/k-y-2007/kanda2011/tool_usable/kuwabara1997
http://hdl.handle.net/10232/6937
http://megalodon.jp/2011-0712-0956-17/sites.google.com/site/articlesoftsukasak/officetk/articles-since2001term/k-y-2007/kanda2011/tool_usable/kuwabara1997