1. T.C.Nast, et.al. “SIRTF Telescope Instrument Changeout and Cryogen Replenishment (STICCR) Study” NASA CR 177380 (Aug. 1985); and A.J.Mord, et.al. “BASD- SIRTF Telescope Instrument Changeout and Cryogen Replenishment (STICCR) Study” NASA CR 177381 (Nov. 1985)
2. J.H.Lee and Y.S. Ng; “Pump Performance Requirement for the Liquid Helium Orbital Resupply Tanker” Cryogenic Engineering Conference (St. Charles, 1987), Paper FC-3.
3. M.G. Ryschkewitsch, private communication.
4. P. Kittel: "Orbital Resupply of Liquid Helium" J. Spacecraft and Rockets, 2,a (1986), 391
5. M.J. DiPirro and S.H. Castles, Cryogenics 26 (1986), p. 84