1. Orbital Gyrocompassing Heading Reference;Bowers;AIAA Journ.of Spacecraft and Rockets,1968
2. Seasat Attitude Control System;Beach;Journal of Guidance and Control,1978
3. Blondin, J. Hahn, E., Makus, P., Cook, L., Golden, P., Krome, H., (1989). Design, Fabrication and Test of a Prototype Double-Gimbal Control Moment Gyroscope for the NASA Space Station, AAS Paper No. 89–006, The 12th Annual AAS Guidance and Control Conference, February 4–8, Keystone, CO.
4. Chen,J-H, Bull.J.,DeBra.D. B., (1989). A Continuous Proportional Low Thrust Propulsion System, IFAC 7th International Aerospace Symposium, Tsukuba, Japan, July.
5. DeBra, D.B, (1965).Principle Developments in Passive Attitude Control, AAS Meeting, Berkeley, CA, 29 December.