1. Abraham, R. and Marsden, J.E. Foundations of Mechanics, 2nd ed., rev. and enl., Advanced Book Program, Reading, MA: Benjamin/Cummings, 1978.
2. Arnol’d, V. I., Small Denominators and Problems of Stability of Motion in Classical and Celestial Mechanics, Uspekhi Mat. Nauk, 1963, vol. 18, no. 6(114), pp. 91–192 [Russian Math. Surveys, 1963, vol. 18, no. 6, pp. 85–191].
3. Arnol’d, V. I., On a Theorem of Liouville Concerning Integrable Problems of Dynamics, Sibirsk. Mat. Zh., 1963, vol. 4, pp. 471–474 [Amer. Math. Soc. Transl. (2), 1967, vol. 61, pp. 292–296].
4. Grad. Texts in Math.;V I Arnol’d,1989
5. Arnol’d, V. I., Kepler’s Second Law and the Topology of Abelian Integrals (according to Newton), Kvant, 1987, no. 12, pp. 17–21 [Kvant selecta: Algebra and Analysis: Vol. 2, Math. World, vol. 15, Providence, RI: AMS, 1999, pp. 131–140].