1. R. A. Laudise, ?The Growth of Single Crystals? (Prentice-Hall Inc, N.J., 1970) Chapter 7.
2. H. N. Holmes, J. Franklin Inst. 184 (1917) 743.
3. W. Eitel, ?The Physical Chemistry of the Silicates? (University of Chicago Press, Chicago, 1954) p. 14.
4. R. W. Berriman, J. Photog. Sci. 12 (1964) 121.
5. K. Mees, ?The Theory of the Photographic Process? (McMillan, New York, 1959).