1. Celestial Mechanics;Danby,1962
2. Inclination of satellite orbits about an oblate precessing planet;Goldreich;Astron. J.,1965
3. An Introduction to Planetary Physics;Kaula,1968
4. Evolution of the Protoplanetary Cloud and Formation of the Earth and the Planets;Safronov;NASA TT F-677,1972
5. The Martian satellites;Singer,1971