1. Cours de Mécanique Céleste, Vol. I;Andoyer,1923
2. A universal reduction procedure for Hamiltonian group actions;Arms,1991
3. Small denominators and problems of stability of motion in classical and celestial mechanics;Arnold;Usp. Mat. Nauk,1963
4. Dynamical Systems III;Arnold,2003
5. An Introduction to the Mathematics and Methods of Astrodynamics;Battin,1999