1. ∗Copernicus, N. (1543) De Revolutionibus Orbium Coelestium, +translation by E. Rosen (1978), Polish Scientific Publications, Warsaw. Other translation: Ch. Gl. Wallis (1962), Great Books of Western World (GBWW), Vol. 16.
2. °∗Kepler, J. (1609) Astronomia Nova, translated by William H. Donahue (1992) as Johannes Kepler New Astronomy, Cambridge University Press.
3. °Dreyer, J.L.E. (1905) History of Astronomy from Thales to Kepler, Cambridge University Press; reprint by Dover (1953).
4. Gingerich, O. (1992) The great Copernicus Chase, Cambridge University Press
5. and (1979) American Scholar, 48, p. 81-8.