1. +Bruno, G. (1584) De l’Infinito Universo e Mondi, translated by Dorothea Waley Singer (1950) as On the Infinite Universe and Worlds, Henry Schuman, New York.
2. °Bruno, G. (1584) La Cena de le Ceneri, translated by Stanley L. Jaki (1975) as The Ash Wednesday Supper, Mouton, The Hague and Paris; other translations available.
3. +Digges, T. (1576) A Perfit Description of the Cælestiall Orbes…, London
4. Burtt, E.A. (1954) The Metaphysical Foundations of Modern Science, Doubleday.
5. Daumas, M. (1957), Histoire de la Science, Paris, Pleïade, NRF.