1. P. Ehrenfest, Commun. Leiden Univ., (1933), Suppl., 576-597.
2. I.M. Lifshits, M. Ya. Azbel and M.I. Kaganov, Elektronnaya Teoriya Metallov (Electronic Theory of Metals), Nauka, Moscow, (1971).
3. L.D. Landau, and E.M. Lifshitz, Teoreticheskaya fizika (Theoretical Physics), vol. 5: Statisticheskaya fizika (Statistical Physics), Nauka, Moscow, part 1, 1995, p.606.
4. The Collected Works of J. Willard Gibbs, Longmans, Green, and Co., New York, (1931).
5. Volmer, M., Kinetik der Phasenbildung, Steinkopf, Dresden, (1939).