1. Venus gravity field from mean elements;Ananda,1979
2. Where are the satellites of the inner planets?;Burns;Nature—Phys. Sci.,1973
3. Asteroid nutation angles;Burns;Mon. Not. Roy. Astron. Soc.,1973
4. Solid rotation of Venus: Role of the atmospheric tide;Cazenave,1977
5. Scientific Papers;Darwin,1908