References[A1] [A2] [A3][A4] [A5][A6][A7][A8] [A9][B1] [B2][B3][C1] [C2]Abraham, R. and Marsden, J.E.: Foundations of Mechanics, Benjamin, New York (1st ed. 1967, 2nd ed. 1978) Aksenev, E.P., Grebenikov, E.A., and Demin, V.C.: Soviet Astronomy, 16 (1964), pp. 164�4. Albouy, A.: ectures on the Two-Body Problem� in Classical and Celestial Mechanics: The Recife Lectures, H. Cabral and F. Diacu, eds. Princeton University Press, Princeton, NJ (2002), pp. 63�16. Alekseev, V.M.: The Generalized Spatial Problem of Two Fixed Centers: The Classiation of Motions. Bulletin of Theoretical Astronomy, X:4 (1965), pp. 241�2. Alfriend, K.T., Dasenbrock, R., Pickard, H., and Deprit, A.: The Extended Phase Space Formulation of the Vinti Problem. Celestial Mechanics, 16 (Dec. 1977), pp. 441�8. Appel, P.E.: Sur les lois de forces centrales faisent dcrire ` leur point-dpplie a cation une conique quelles qui soient les conditions initiales. American Journal of Mathematics, 13 (1891), pp. 153�. Arenstorf, R.F. and Davidson, M.C.: Solutions of the Restricted Three-Body Problem Represented by Means of the Two-Fixed-Center Problem. AIAA-Journal, 1 (1963), p. 228. Arnold, V.I.: Mathematical Methods in Classical Mechanics, Springer-Verlag, New York (1980) (Moscow, 1974), pp. 261�. Arnold, V.I., Kozlov, V.V., and Neishtadt, A.I.: Mathematical Aspects of Classical and Celestial Mechanics, Springer-Verlag, New York (1997) (Moscow, 1985), pp. 128�. Badalyan, G.K.: On the Form of the Trajectories in Two Immovable Centers. Proc. Second All-Union Math. Congress, Vol. II (1934), pp. 239�1 [In Russian]. Bernoulli, J.: xtrait de la Rponse de M. Bernoulli ` M. Hermann� date de e a e Basle, le 7 Octobre 1710. Mmoires de Lcadmie Royale des Sciences, Paris e e (1710,) pp. 521�3. Bonnet, O.P.: (a) Note sur un thor`me de mcanique: (b) Solution de quelques e e e probl`mes de mcanique. Journal de Mathmatiques pures et appliques (Lioue e e e ville Journal), 9 (1844); (a) pp. 113�; (b) p. 217. Charlier, C.V.L.: Die Mechanik des Himmels. 1st ed., von Veit, Leipzig, Vol. 1 (1902), Vol. 2 (1907); 2nd ed., de Gruyter, Berlin (1927). Cipra, B.: Celestial Pas de Trois.�In What Happening in the Mathematial Sciences, Vol. 5, P. Zorn, ed. AMS Publications, Providence, RI (2002), pp. 68�6.