1. F. Balena, The Scale Omnibus (v1.02), 2014.
2. The Source: The Dictionary of Contemporary and Traditional Scales.;Barta,1986
3. Exotic Scales: New Horizons for Jazz Improvisation.;Befumo,2002
4. D. Byrd, Extremes of conventional music notation, 2006.
5. Automatic pitch spelling: from numbers to sharps and flats;Cambouropoulos,2001