- Reference
  Total Illusions - The Forums - Dangerous Hacker!
  http://www.jellyslab.com/~bteo/hacker.htm
- via
  Matzにっき - 2005-04-20
  http://www.rubyist.net/%7Ematz/20050420.html#p02
  www.textfile.org - 2005-04-21
  http://www.hyuki.com/tf/200504#i20050421160000