1. L. Boltzmann,Lectures on Gas Theory, Vol. 2 (in German). (J. A. Barth, Leipzig, 1898), Sec. 90.
2. E. P. Wigner,Group Theory and Its Application to the Quantum Mechanics of the Atomic Spectra (Academic Press, New York, 1959; first German edn.: Vieweg, Braunschweig, 1931).
3. H. Goldstein,Classical Mechanics (Addison-Wesley, Reading, Massachusetts, 1980), p. 332.
4. G. Nicolis and I. Prigogine,Self-Organization in Nonequilibrium Systems (Wiley, New York, 1977).
5. L. Boltzmann, “On the question of the objective existence of the processes in inanimate nature” (in German),Sitz. Kais. Akad. Wiss. (Vienna)Math.-Naturw. Kl. 60(IIa), 83 (1897), footnote 11.