1. Bohlen, Heinz. 2005. “An 833 Cents Scale: An Experiment on Harmony.” http://huygens-fokker.org/bpsite/833cent.html.
2. Carlos, Wendy. 1989–96. “Three Asymmetric Divisions of the Octave.” http://www.wendycarlos.com/resources/pitch.html.
3. Inc, OEIS Foundation. 2019. “The On-Line Encyclopedia of Integer Sequences.” https://oeis.org/A000142.
4. The Discovery of Difference Tones