[1] ドラッグによるテキストの選択をキャンセルする【CSS, HTML, JavaScript】 - Programming Magic ( (2010-12-26 18:53:25 +09:00 版)) <http://www.programming-magic.com/20071217225449/>

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

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

[4] Specifying selectable text (Windows) ( (2013-11-13 13:47:53 +09:00 版)) <http://msdn.microsoft.com/en-us/library/ie/hh708742(v=vs.85).aspx>

[5] IRC logs: freenode / #whatwg / 20150601 (2015-06-02 13:50:24 +09:00 版) <http://krijnhoetmer.nl/irc-logs/whatwg/20150601>

[6] -webkit-user-select: text;

[7] -webkit-user-select: ignore

[8] Fixes #37. Add -webkit-user-select prefixed property alias. · whatwg/compat@49fb0fb (2016-02-05 14:44:26 +09:00 版) <https://github.com/whatwg/compat/commit/49fb0fb55c9c866df8d2b521b634009b21b03a22>

[9] [css-ui-4] -webkit-user-select (Florian Rivoal 著, 2016-02-06 14:28:09 +09:00 版) <https://lists.w3.org/Archives/Public/www-style/2016Feb/0050.html>

[10] [css-ui-4] aliasing of -webkit-user-select · w3c/csswg-drafts@dfde9cf (2016-04-04 10:57:33 +09:00 版) <https://github.com/w3c/csswg-drafts/commit/dfde9cf322831e1bc0d1385e6df68057adc08ec6>

[11] Fixes #49. Remove -webkit-user-select alias. · whatwg/compat@a1c9eed (2016-04-05 14:07:40 +09:00 版) <https://github.com/whatwg/compat/commit/a1c9eed977cfdda1830d79636d22bb9e9ab1eca4>

[12] [css-ui] Add note about excessive use of user-select:none (frivoal著, 2017-06-23 14:39:56 +09:00) <https://github.com/w3c/csswg-drafts/commit/016920866197fe3a8fd0e23ce9d062358fcae49b>