[1] CSS Regions Module Level 3 ( (2012-04-30 05:05:51 +09:00 版)) http://www.w3.org/TR/2012/WD-css3-regions-20120503/

[2] CSS Regions Module Level 1 ( (2013-05-28 06:14:15 +09:00 版)) http://www.w3.org/TR/2013/WD-css3-regions-20130528/