2004-06-14 記事 http://www.itmedia.co.jp/news/articles/0406/09/news083.html http://www.itmedia.co.jp/enterprise/articles/0406/09/news047.html http://www.andraste.org/discfault/discfault.htm http://www003.upp.so-net.ne.jp/ikeda/Lessig-Ikeda.html