[1] Web Controls 1.0 (2004-11-09 08:49:52 +09:00 版) <http://www.whatwg.org/specs/web-controls/current-work/#key-handling>

[2] IRC logs: freenode / #whatwg / 20090910 (2009-10-18 19:56:51 +09:00 版) <http://krijnhoetmer.nl/irc-logs/whatwg/20090910#l-313>

[3] User Interface Enhancements ( (1999-09-16 05:07:02 +09:00 版)) <http://www.w3.org/TR/1999/WD-css3-userint-19990916#key-equivalent>

[4] User Interface for CSS3 ( (2000-06-23 03:09:21 +09:00 版)) <http://www.w3.org/TR/2000/WD-css3-userint-20000216#key-equivalent>

[5] CSS3 module: Basic User Interface ( (Tantek Çelik 著, 2002-08-03 07:13:43 +09:00 版)) <http://www.w3.org/TR/2002/WD-css3-ui-20020802/#key-equivalent>

[6] CSS3 Basic User Interface Module ( (Tantek Çelik 著, 2003-07-04 02:51:33 +09:00 版)) <http://www.w3.org/TR/2003/WD-css3-ui-20030703/#key-equivalent>

[7] Web Controls 1.0 ( (2004-11-09 08:49:52 +09:00 版)) <http://www.whatwg.org/specs/web-controls/current-work/#key-handling>

[8] Web Applications Markup Language 1.0 ( (2004-04-08 02:39:12 +09:00 版)) <http://hixie.ch/specs/html/apps/web-apps-1#key-handling>