1. Bent, D. Ian. 2010. “Notation. Grove Music Online. Oxford Music Online”. http://www.oxfordmusiconline.com/subscriber/article/grove/music/20114
2. Brown, E. 1962. “Open form general instructions”. http://Earlee-brown.org/media/Earlee%20Brown%20open%20form%20general%20instructions.pdf
3. Brown, E. 1970. “On December 1952”. http://www.Earlee-brown.org/media/Earlee%20Brown,%20On%20December52_(Nov_27_1970).mp3