1. J.C. Maxwell, Philos. Trans. R. Soc. London 157, 49 (1867)
2. L. Boltzmann, Wien. Ber. 66, 275 (1872); Wien Anz. 9, 23 (1872); Abh. 1, 316 (1872); Lectures on Gas Theory (University of California, Berkeley, 1964) (trans: S.G. Brush)
3. J.W. Gibbs, Elementary Principles in Statistical Mechanics (Yale University Press, New Haven, 1902)
4. D. Enskog, K. Svensk. Vet.-Akad. Handl. 63(4) (1921); see also Ref. [5]
5. S. Chapman, T.G. Cowling, The Mathematical Theory of Nonuniform Gases, 3rd edn. (Cambridge, U.P., London, 1970)