1. H. O. McMahon, R. J. Bowen, and G. A. Bleyle, Jr., Trans. ASME, 72(7):623 (1950).
2. G. Vonk, in: Advances in Cryogenic Engineerings Vol. 13, Plenum Press, New York (1968), p. 582.
3. R. L. Garwin, U.S. Pat. No. 3,228,460.
4. W. M. Kays and A. L. London, Compact Heat Exchangers, 2nd ed., McGraw-Hill Book Co. (1964), p. 118.
5. W. H. McAdams, Heat Transmission, 3rd ed., McGraw-Hill Book Co. (1954), p. 268.