[1] [CITE@en[GNU IDN Library - Libidn - GNU Project - Free Software Foundation]]
( ([TIME[2011-03-07 07:45:44 +09:00]] 版))
<http://www.gnu.org/software/libidn/>

[2] [CITE[Spaceship - Internet24 patches to Open Source Software]]
( ([TIME[2011-03-07 07:58:51 +09:00]] 版))
<http://spaceship.berlios.de/index.php?page=idn.php>