http://techon.nikkeibp.co.jp/article/COLUMN/20080710/154652/

http://www.d-itlab.co.jp/ja/http://rikunabi-next.yahoo.co.jp/rnc/docs/cp_s01800.jsp?rqmt_id=0005890497&n_foot=sel_kikai

http://response.jp/issue/2008/0711/article111524_1.html