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2. J. M. Burgers, Flow Equations for Composite Gases (Academic Press, 1969).
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4. S. Chapman and T. G. Cowling, Mathematical Theory of Non-Uniform Gases (Cambridge Univ. Press, Cambridge, 1952; Inostrannaya Literatura, Moscow, 1960).
5. P. D. Noerdlinger, Astron. Astrophys. 57, 407 (1977).