[1] [CITE[pubsubhubbub - Project Hosting on Google Code]]
([TIME[2009-08-19 18:56:26 +09:00]] 版)
<http://code.google.com/p/pubsubhubbub/>

[2] [CITE@en[Draft: PubSubHubbub Core 0.3 -- Working Draft]]
( ([TIME[2010-02-10 03:04:23 +09:00]] 版))
<http://pubsubhubbub.googlecode.com/svn/trunk/pubsubhubbub-core-0.3.html>