1. Les Methods Nouvelles de la Mechanique Celeste;Pioncare,1892
2. Dynamical systems;Birkhoff,1927
3. On the preservation of quasi-periodic motions under a small variation of Hamilton’s function;Kolmogorov;Doklady Akademy Nauk SSSR,1954
4. Mathematical Methods of Classic Mechanics;Arnold,1989
5. Small denominators and the problem of stability of motion in classical and celestial mechanics;Arnold;Russian Mathematical Surveys,1963