1. For an introduction to nucleation theory, the following books are recommended: J. Frenkel, Kinetic Theory of Liquids (Dover, New York, 1955), Chap. VII, and Nucleation, edited by A. C. Zettlemoyer (Marcel Dekker, New York, 1969).
2. The term spinodal decomposition seems to have been coined by J. W. Cahn. Some of the key papers on the subject are M. Hillert, Acta Metall. 9, 525 (1961), J. W. Cahn, ibid. 9, 795 (1961); J. W. Cahn, J. Chem. Phys. 42, 93 (1965).
3. J. W. Cahn, Trans. AIME, 166 (1968). This is a particularly illuminating introduction to the subject.
4. J. S. Langer, Ann. Phys. (N. Y. ) 54, 258 (1969).
5. J. S. Langer, Physica 73, 61 (1974).