1. H. Grad, inTransport Theory, edited by R. Bellman, G. Birkhoff, and I. Abu-Shumays (American Mathematical Society, Providence, R.I., 1969), p. 269.
2. Y. Sone, inRarefied Gas Dynamics, edited by L. Trilling and H. Y. Wachman (Academic, New York, 1969), Vol, 1, p. 243.
3. Y. Sone, inRarefied Gas Dynamics, edited by D. Dini (Editrice Tecnico Scientifica, Pisa, 1971), Vol. 2, p. 737.
4. J. S. Darrozes, inRarefied Gas Dynamics, edited by L. Trilling and H. Y. Wachman (Academic, New York, 1969), Vol. 1, p. 111.
5. J.-P. Guiraud, inTheoretical and Applied Mechanics, edited by E. Becker and G. K. Mikhailov (Springer-Verlag, Berlin, 1973), p. 104.