1. Adkins, Cecil. 1967. The technique of the monochord. Acta Musicologica 39 (1,2): 34–43.
2. Aristotle. 1984. In The complete works of Aristotle, ed. J. Barnes. Princeton: Princeton University Press.
3. Barbera, C. Andre. 1980. The persistence of Pythagorean mathematics in ancient musical thought. Ann Arbor: University of North Caroline at Chapel Hill.
4. Barbieri, Patrizio. 2004. The speaking trumpet: Developments of Della Porta’s “ear spectacles” (1589–1967). Studi Musicali 33 (1): 205–248.
5. Barker, Andrew. 2007. The science of harmonics in classical Greece. Cambridge: Cambridge University Press.