1. V. D. Ozrin, Teor. Mat. Fiz.,57, 290 (1983).
2. P. M. V. Résibois and M. De Leener, Classical Kinetic Theory of Fluids, Wiley-Interscience, New York (1977).
3. M. H. Ernst and A. Weyland, Phys. Lett. A,34, 39 (1971).
4. A. Weyland, J. Math. Phys.15, 1942 (1974).
5. T. Keyes and J. Mercer, Physica (Utrecht),95A, 473 (1979); A. J. Masters and T. Keyes, Phys. Rev. A,25, 1010 (1982).