1. Structure and thermal evolution of the Galilean satellites;Cassen,1982
2. On the secular change in the elements of the orbit of a satellite revolving about a tidally distorted planet;Darwin;Phil. Trans. R. Soc. London,1880
3. Tidal friction and cosmogony;Darwin,1908
4. Coordinates of Features on the Galilean Satellites;Davies,1980
5. The Shape of Io;Davies,1983