[2] CSS Basic User Interface Module Level 3 (CSS3 UI) ( (Tantek Çelik 著, 版)) <http://www.w3.org/TR/2012/WD-css3-ui-20120117/#box-sizing>
[3] User Interface Enhancements ( ( 版)) <http://www.w3.org/TR/1999/WD-css3-userint-19990916#box-sizing>
[4] Issue #9. Add alias for -webkit-box-sizing. · whatwg/compat@e0a9b6c ( 版) <https://github.com/whatwg/compat/commit/e0a9b6c2f6759b70108081a47470ab51ee67c04e>
document.defaultView.getComputedStyle(element, null).getPropertyValue('width');
標準モードでFirefox, Opera, Safariで確認したのですが、
Opera (v9.25) のみ、paddingとborderを含んだ値が返って来ます
[6] [css-sizing] Import full propdef tables for all sizing properties, an… (tabatkins著, ) <https://github.com/w3c/csswg-drafts/commit/aab263247a81dce2d2c4be5e6653d46ee63e261d>
[7] [css-ui-4][css-sizing] Moving box-sizing to the right spec · Issue #1906 · w3c/csswg-drafts () <https://github.com/w3c/csswg-drafts/issues/1906>