1. V. I. Arnold and A. Avez,Ergodic Problems in Classical Mechanics (Benjamin, New York, 1968).
2. P. Ehrenfest and T. Ehrenfest,Enzykl Math. Wiss. IV 32 (1911).
3. S. Goldstein and O. Penrose,J. Stat. Phys. 24:325–343 (1981).
4. S. Ito, M. Mizutani and T. Niwa,J. Math. Kyoto Univ. 26:1–11 (1986).
5. A. I. Khinchin,Mathematical Foundations of Statistical Mechanics (Dover, New York, 1949).