[1] [CITE@en-GB-hixie[Web Controls 1.0]]
( ([TIME[2004-11-09 08:49:52 +09:00]] 版))
<http://www.whatwg.org/specs/web-controls/current-work/#pseudo-classes>

[2] [CITE@en-GB-hixie[Web Applications Markup Language 1.0]]
( ([TIME[2004-04-08 02:39:12 +09:00]] 版))
<http://hixie.ch/specs/html/apps/web-apps-1#pseudo-classes>