1. R. H. Wilson, Jr. “Rotational Decay of Satellite 1960 η2 Due to the Magnetic Field of the Earth,” Proc. XII, Intern. Astronaut. Congr., Washington, D.C., Academic Press, N.Y., 1963 pp. 368–379.
2. G. Colombo, “The Motion of Satellite 1958-ε Around its Center of Mass”, Research in Space Sci., Smithsonian Astrophys. Obs. Spec. Rpr. No. 70, July 18, 1961.
3. W. Bandeen and W. P. Manger, “Angular Motion of the Spin Axis of the Tiros I Meterological Satellite Due to Magnetic and Gravitational Torques,” J. Geophys. Res., Sept. 1960.
4. J. E. Jackson, “Swept Frequency Topside Sounder S-27,” NASA Payload Description N-90005, March 1, 1961.
5. D. D. Williams, “Dynamical Analysis and Design of the Synchronous Communications Satellite,” Hughes Aircraft Co., Tech. Memo. 649, May 1960.