1. Celestial Mechanics—The Recife Lectures;A. Albouy,2002
2. Arnol’d, V. I.: Mathematical Methods of Classical Mechanics, Springer-Verlag: New York, Heidelberg, Berlin (1978).
3. ——: Huygens and Barrow, Newton and Hooke, Birkhäuser: Basel, Boston, Berlin (1990).
4. Chandrasekhar, S.: Newton’sPrincipia for the Common Reader, Clarendon Press, Oxford (1995).
5. Cohen, I. B.:A Guide to Newton’s Principia, in Newton I.:The Principia, new translation by I. B. Cohen and A. Whitman, University of California Press, Berkeley (1999).