1. Bagenal, F., Dowling, T. E., and McKinnon, W. B., Jupiter: The Planet, Satellites and Magnetosphere, Cambridge Univ. Press, Cambridge, England, U.K., 2004, pp.281-306.
2. Induced magnetic fields as evidence for subsurface oceans in Europa and Callisto
3. Enceladus' Water Vapor Plume
4. Cassini Observes the Active South Pole of Enceladus
5. Rall, C. S. "Freefall Periodic Orbits Connecting Earth and Mars," Ph.D. Thesis,Dept. of Aeronautics and Astronautics, Massachusetts Inst. of Technology, Cambridge, MA,Oct. 1969.