[1] Specifications | Matroska (2010-07-24 23:58:10 +09:00 版) http://www.matroska.org/technical/specs/index.html

[2] Matroska Media Container - Homepage | Matroska (2017-05-09 16:58:29 +09:00) https://www.matroska.org/

[3] Specifications | Matroska (2017-05-09 17:14:30 +09:00) https://www.matroska.org/technical/specs/index.html