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