1. L. Lewin, Advanced Theory of Waveguides (Iliffe, London, 1951; Inostrannaya Literatura, Moscow, 1954).
2. M. Born and E. Wolf, Principles of Optics (Pergamon, Oxford, 1968; Nauka, Moscow, 1973).
3. A. M. Goncharenko and V. A. Karpenko, Foundations of the Theory of Optical Waveguides (Nauka i Tekhnika, Minsk, 1983) [in Russian].
4. W. C. Chew, Waves and Fields in Inhomogeneous Media (IEEE Press, New York, 1995).
5. L. Felsen and N. Marcuvitz, Radiation and Scattering of Waves (Wiley, New York, 2003).