1. Motion of a viscoelastic sphere in a central Newtonian force field;Vil'ke;PMM,1980
2. Analytical and Qualitative Methods in the Dynamics of a System with an Infinite Number of Degrees of Freedom;Vil'ke,1982
3. Tides and Resonances in the Solar System,1976
4. Motion of a Satellite Relative to the Centre of Mass in a Gravitational Field;Beletskii,1975
5. Theoretical Physics;Landau,1965