http://allabout.co.jp/super/

http://rakusai.org/kamiwiki/ 操作感がすごい！

http://blog.bmedianode.com/2005/04/zend_certificat.html 参考 http://tdiary.ishinao.net/20050419.html#p03

http://dev.ariel-networks.com/modules/xfsection/article.php?articleid=12 参考 http://www.rubyist.net/~matz/20050418.html#p01