[1] [CITE@en-GB-x-Hixie[Web Forms 2.0]]
([TIME[2009-01-05 20:07:15 +09:00]] 版)
<http://www.whatwg.org/specs/web-forms/current-work/#relation>

[2] [CITE@en[Opera: Opera 11.00 for Windows changelog]]
( ([[Frank M. Palinkas, Technical Writer, Opera Software ASA]] 著, [TIME[2011-04-24 11:17:12 +09:00]] 版))
<http://www.opera.com/docs/changelogs/windows/1100/>