1. Fowler, R.H.: Statistical Mechanics, 2nd ed. Cambridge: Cambridge University Press 1955
2. Kittel, C.: Elementary Statistical Physics, pp. 169?171. New York-London-Sydney: John Wiley 1958
3. For a recent derivation of the Pauli equation see Zwanzig, R.W.: Lectures in Theoretical Physics, Vol. 3, ed. W. E. Brittin, B. W. Downs, J. Downs, pp. 106?141. New York: Interscience 1961
4. Agarwal, G.S.: Progress in Optics, Vol. XI, ed. E. Wolf, pp. 1?76. Amsterdam-London: North Holland 1973
5. Tolman, R.C.: The Principles of Statistical Mechanics, pp. 521?523. London: Oxford University Press 1938