1. See, for example, M. Born and E. Wolf: Principles of Optics (Pergamon, Oxford, 1964) 2nd ed., Chap. 10, p. 508.
2. J.W. Goodman: Statistical Optics (John Wiley & Sons, New York, 1985) Chap. 5, p. 208.
3. L. Mandel and E. Wolf: J. Opt. Soc. Am. 66 (1976) 529.
4. J.W. Goodman: Introduction to Fourier Optics (McGraw-Hill, 1968) Chap. 3, p. 40.
5. J.W. Goodman: Introduction to Fourier Optics (McGraw-Hill, 1968) Chap. 4, p. 58.