[1] [CITE[IRC logs: freenode / #whatwg / 20110727]]
( ([TIME[2011-08-07 19:50:38 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20110727>

[2] [CITE[Document Object Model for MathML]]
( ([TIME[2001-02-20 21:36:11 +09:00]] 版))
<http://www.w3.org/TR/2001/REC-MathML2-20010221/chapter8.html>