1. and , ‘Station-keeping methods for two broadcasting satellites in the same geostationary position’, Proc. of Second Int. Symp. on Spacecraft Flight Dynamics, ESA SP-255, 141–147 (1986).
2. Methods of Orbit Determination, Wiley, 1976.
3. Design of Geo-synchronous Spacecraft, Prentice-Hall Inc., 1986.
4. ‘Introduction to geostationary orbits’, ESA SP-1053 (1983).