1. NBS Tech. Note;TR Strobridge,1963
2. NBS Technical Note;JW Dean,1961
3. R. F. Barron, Cryogenic Systems, McGraw-Hill, New York, 1966, p. 110.
4. F. J. Edeskuty and K. D. Williamson, Liquid Cryogens, Vol. 11, Properties and Applications, CRC Press, Boca Raton, FL, 1983.
5. D. Hale, LNG Economics and Technology, 2nd ed., Energy Communications, Inc., Dallas, TX, 1974.