1. Johnson, A. L., “Spacecraft Borne Long Life Cryogenic Refrigeration Status and Trends,” Cryogenics, pp.339–347, July 1983.
2. Henderson, B. W., “U. S. Industry Close to Producing Long-Life Space Cooling System,” Aviation Week & Space Technology, 6 April 1992.
3. Davey, C., “The Oxford University Miniature Cryogenic Refrigerator,” International Conference on Advanced Infrared Detectors and System, London, pp.39, 1981.
4. Johnson, R. P., et. al., “A Stirling Engine with Hydraulic Power Output for Powering Artificial Hearts,” Paper 75212, IECEC Record 1975.
5. Curtis, P. D., et. al., “Remote Sounding of Atmospheric Temperature from Satellites. V — The Pressure Modulator Radiometer for Nimbus F,” Proc. R. Soc. (London), A 337, pp. 135–150, 1974.