1. Contrapunctus project,
http://www.punctus.org
2. Haus, G., Longari, M.: MAX, Musical Application using XML (2002)
3. MusicXML,
http://www.recordare.com/xml.html
4. Good, M.: Lessons from the Adoption of MusicXML as an Interchange Standard. In: Proceedings of XML 2006, Boston, December 5-7 (2006)
5. The Braille Music Subcommittee, World Blind Union: New International Manual of Braille Music Notation