1. M. A. K. Hamid, IEEE Trans. AP,21, No. 3, 398 (1973).
2. P. Ya. Ufimtsev, Method of Edge Waves in the Physical Theory of Diffraction [in Russian], Sov. Radio, Moscow (1962).
3. D. R. Wait, Electromagnetic Radiation from Cylindrical Systems [in Russian], Sov. Radio, Moscow (1963).
4. E. Yanke, F. Emde, and F. Lesh, Special Functions [in Russian], Nauka, Moscow (1977).