[1] [CITE[''''''[''''''whatwg'''''']'''''' Forcing orientation in content]]
( ([TIME[2013-09-10 23:02:32 +09:00]] 版))
<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2013-September/040758.html>

[2] [CITE[''''''[''''''whatwg'''''']'''''' Forcing orientation in content]]
( ([TIME[2013-07-13 12:26:29 +09:00]] 版))
<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2013-July/040060.html>