1. Termes á lonqués periodes dans le système solaire;Bretagnon;Astron. Astrophys.,1974
2. Methods of Celestial Mechanics;Brouwer,1961
3. The secular variations of the orbital elements of the principal planets;Brouwer;Astron. Papers Amer. Ephem. Naut. Almanac,1950
4. Physics of the primitive solar accretion disk;Cameron;Moon and Planets,1978
5. The formation of the Cassini division in Saturn's rings;Goldreich;Icarus,1978