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2. Chapman, S. and Cowling, T. G. "The Mathematical Theory of Non-Uniform Gases," Cambridge Univ. Press, London, 1952, 2nd ed., chaps. 7 and 8, pp.107-150.
3. Hirschfelder, J. O., Curtiss, C. F. and Bird, R. B. "Molecular Theory of Gases and Liquids," John Wiley & Sons, Inc., N. Y., 1954, chap. 7, pp.441-513.
4. Hinshelwood, C. N. "The Structure of Physical Chemistry," Oxford Univ. Press, London, 1951, pp.351-432.