1. L. I. Maissel, ?Handbook of Thin Film Technology?, edited by L. I. Maissel and R. Glang (McGraw-Hill, New York, 1970) Chap. 13.
2. K. L. Chopra, ?Thin Film Phenomena? (McGraw-Hill, New York, 1970).
3. D. C. Larson, ?Physics of Thin Films?, Vol. 6, edited by M. H. Francombe and R. W. Hoffmann (Academic Press, New York, 1971).
4. R. M. Hill,Thin Solid Films 12 (1972) 367.
5. M. R. Bennett andJ. G. Wright,Phys. Status Solidi 13(a) (1972) 135.