1. E. Perucca:Fisica Generale e Sperimentale-7th Ed. (U.T.E.T., Torino, 1960) vol. 2, 1st tome
2. F.A. Jenkins, H.E. White:Fundamentals of Optics, 3rd Ed. (McGraw-Hill, New York, 1957)
3. M. Born, E. Wolf:Principles of Optics, 2nd Ed. (Pergamon Press, Oxford, 1964)
4. M.V. Klein:Optics (J. Wiley & S., New York, 1970)
5. M. Planck:Theory of Heat (The MacMillan Co., New York, 1949)