[1] [CITE@en[W3C Digital Publishing Interest Group]]
( ([TIME[2013-06-26 01:36:22 +09:00]] 版))
<http://www.w3.org/dpub/IG/>

[2] [CITE[Digital Publishing Interest Group]]
( ([TIME[2013-06-26 01:48:53 +09:00]] 版))
<http://www.w3.org/2013/02/digpubig.html>

[3] [CITE@en[eBooks: eBooks & I18N: Richer Internationalization for eBooks - 4 June 2013]]
( ([TIME[2013-07-11 08:02:21 +09:00]] 版))
<http://www.w3.org/2013/06/ebooks/report>