1. S. Tolansky,Surface Microtopography(Interscience Publishers, Inc., New York, 1960).
2. S. Tolansky,Multiple-Beam Interferometry(Oxford Clarendon Press, London, 1948), Chap. 4.
3. O. S. Heavens,Optical Properties of Thin Solid Films(Butterworths Scientific Publications, Ltd., London, 1955), p. 107.
4. M. Born and E. Wolf,Principles of Optics(Pergamon Press, Ltd., London, 1959), p. 288.
5. Reference 3, p. 110.