1. S. Ukai and K. Asano, On the Existence and Stability of Stationary Solutions of the Boltzmann Equation for a Gas Flow Past an Obstacle, inSem. College de France, Res. Notes Math. 53 (to appear).
2. S. Goldstein, J. L. Lebowitz, and K. Ravishankar, Ergodic Properties of a System in Contact with a Heat Bath: A One Dimensional Model,Commun. Math. Phys. 85:419–427 (1982).
3. P. Billingsley,Convergence of Probability Measures (Wiley, New York, 1968).
4. W. Feller,An Introduction to Probability Theory and Its Applications. Vol. I (Wiley, New York, 1968), Vol. II (1971).
5. C. Ryll-Nardzewski, Remarks on Processes of Calls, Proc. of Fourth Berkeley Symposium, Vol. 2, pp. 455–465 (1960).