[1] IRC logs: freenode / #whatwg / 20120803 ( (2012-08-25 11:16:05 +09:00 版)) http://krijnhoetmer.nl/irc-logs/whatwg/20120803

[2] IRC logs: freenode / #whatwg / 20121010 ( (2012-10-14 18:58:16 +09:00 版)) http://krijnhoetmer.nl/irc-logs/whatwg/20121010

[3] [css-values-4] Per WG resolution, dppx is the canonical <resolution> … (tabatkins著, 2018-05-10 09:08:08 +09:00) https://github.com/w3c/csswg-drafts/commit/ce8046fd907c17d2e0ab6d0f7ed65f81eedcb89a

[4] [css-values-4][cssom] <resolution> serializes to 'dppx', not 'x' · Issue #2241 · w3c/csswg-drafts (2018-05-11 12:35:40 +09:00) https://github.com/w3c/csswg-drafts/issues/2241

[5] [css-values-4][cssom] <resolution> serializes to 'dppx', not 'x' · Issue #2241 · w3c/csswg-drafts (2018-05-11 12:35:47 +09:00) https://github.com/w3c/csswg-drafts/issues/2241