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2. ‘Liquid Helium Pumps for In-Orbit Transfer’;Kittel;Cryogenics,1987
3. ‘Superfluid Helium On-Orbit Transfer (SHOOT)’;DiPirro;Advances in Cryogenic Engineering,1988
4. ‘Superfluid Helium On-Orbit Transfer Flight Experiment: Performance Estimates’;DiPirro;Cryogenics,1988
5. Kittel, P. ‘Losses in Fountain Effect Pumps’. Proceedings of the Eleventh International Cryogenic Engineering Conference, Butterworth, Guildford, UK (1986), p. 317.