1. Benson, D. (2008). Music, a mathematical offering. Oxford University Press.
2. Modulation theory;Bloch A.;Journal of the Institution of Electrical Engineers -- Part I: General,1944
3. Notes on the Theory of Modulation
4. Caspe F. McPherson A. & Sandler M. (2022). DDX7: Differentiable FM synthesis of musical instrument sounds. In Proceedings of the 23rd ISMIR conference (pp. 608–615). ISMIR.
5. The synthesis of complex audio spectra by means of frequency modulation;Chowning J.;Journal of the Audio Engineering Society,1973