1. L. B. Alberti. De Re Aedificatoria; Alberti’s Ten Books of Architecture, translated by James Leoni, 1485.
2. Dante Alighieri. Convivio, c. 1304–1307. English translation: Dante Alighieri. Il Convivio (The Banquet), translated by Richard H. Lansing. Garland Library of Medieval Literature, 1990.
3. G. H. Anderson. Pythagoras and the origin of music theory. Indiana Theory Review 6 (1983), 35–61.
4. Anonymous: Early music. Science 276 (1997), 203–205.
5. R. C. Archibald. Mathematicians and music. Amer. Math. Monthly 31 (1924), 1–25.