2007-05-18 ■ http://business.nikkeibp.co.jp/article/skillup/20070515/124868/ http://www.nikkeibp.co.jp/lc/bag/070516_menhanpu/ http://www.nikkeibp.co.jp/lc/minaoshi/070516_rougo/ http://www.nikkeibp.co.jp/lc/kokoroe/070515_kimura/ http://www.watch.impress.co.jp/akiba/hotline/20070519/ni_i_nw.html