1. Borchmann, D.: Context orbifolds. Diplomarbeit, Technische Universität Dresden (2009)
2. Lecture Notes in Computer Science;D Borchmann,2009
3. Fiore, T.M., Noll, T., Satyendra, R.: Morphisms of generalized interval systems and PR-groups. J. Math. Music 7(1), 3–27 (2013).
http://dx.doi.org/10.1080/17459737.2013.785724
4. Forte, A.: The Structure of Atonal Music, 3rd edn. Yale University Press, New Haven (1979)
5. Ganter, B., Henkel, H., Wille, R.: MUTABOR - ein rechnergesteuertes Musikinstrument zur Untersuchung von Stimmungen. Acustica 57(4–5), 284–289 (1985)