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

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

[3] Note for ReadableStreamDefaultReader.close is confusing · Issue #912 · whatwg/streams (2018-03-30 15:34:11 +09:00) <https://github.com/whatwg/streams/issues/912>

[4] Note for ReadableStreamDefaultReader.close is confusing · Issue #912 · whatwg/streams (2018-03-30 15:34:11 +09:00) <https://github.com/whatwg/streams/issues/912>

[5] Fix closed getter note (surma著, 2018-03-29 19:36:24 +09:00) <https://github.com/whatwg/streams/commit/37ace3d5f16cbea7aec4a0c80532c95059994d51>

[6] Fix closed getter note (fixes #912) by surma · Pull Request #914 · whatwg/streams (2018-03-30 15:34:30 +09:00) <https://github.com/whatwg/streams/pull/914>