1. Jakes, W.C., Microwave mobile communications, (Wiley, New York 1974),Chap. 1,
2. Schwartz, M., Bennett, R.W., and Stein, S.: Communication systems and techniques, (McGraw-Hill, New York 1966)
3. Ryshik, I.M., and Gradstein, I.S.: Tables of integrals, series and products, (Academic Press 1965)