1. M. Born andE. Wolf:Principles of Optics (New York, 1959).
2. M. Beran:Report on the propagation on random electromagnetic waves on free space, Report no. AFCRC TR-58-112, ASTIA Doc. no. AD146826 (February, 1958).
3. M. Beran:Optica Acta,5, 88 (1958).
4. G. Parrent andT. Skinner:Optica Acta,8, 93 (1961).
5. M. Born andE. Wolf:Principles of Optics (New York, 1959), Ch. 10.