1. A. R. Urbach and P. V. Mason, IRAS cryogenic system flight performance report, in: “Advances in Cryogenic Engineering”, Vol. 29, Plenum Press, New York (1984), p. 651.
2. E. W. Urban and D. R. Ladner, Comparison of I. R. telescope cryogenic performance - laboratory versus space, presented at Space Cryogenics Workshop, Madison, Wisconsin (1987).
3. P. V. Mason et al, Preliminary results of the Spacelab 2 superfluid helium experiment, in: “Advances in Cryogenic Engineering”, Vol. 31, Plenum Press, New York (1986), p. 869.
4. R. A. Hopkins and M. G. Ryschkewitsch, Measured ground performance and predicted orbital performance of the superfluid helium dewar for the Cosmic Background Explorer, in: “Cryogenic Optical Systems and Instruments 2: Proc. SPIE”, Los Angeles, California (1987), p. 134.
5. J. A. Lipa, Aerospace Century 21 (Advances in the Astronautical Sciences Ser.), Vol. 64, G. W. Morgenthaler et al. eds., Univelt, Inc., (1987), p. 1245.