1. R. E. Fischell, “Magnetic and Gravity Attitude Stabilization of Earth Satellites,” Applied Physics Laboratory Report CM-996, May 1961.
2. R. E. Fischell and F. F. Mobley, A System for Passive Gravity-Gradient Stabilization of Earth Satellites, in: “Progress in Astronautics and Aeronautics,” Academic Press, Inc., N. Y., (1964), Vol. 13.
3. F. F. Mobley, “Gradient-Gradient Stabilization Results from the DODGE Satellite,” AIAA 2nd Communications Satellite Systems Conference, April 1968.
4. B. E. Tossman, “Magnetic Attitude Control System for the Radio Astronomy Explorer-A Satellite,” Paper No. 68-855, AIAA Guidance, Control and Flight Dynamics Conference, August 1968.
5. Private communication from L. Muhlfelder, RCA-Astronautics, Hightstown, New Jersey.