1. M. A. Leontovich and V. A. Fok, “Experiments on radiowave propagation,” Zh. Eksp. Teor. Fiz. 16 (7), 557–573 (1946).
2. E. G. Abramochkin and V. G. Volostnikov, Modern Optics of Gaussian Beams (Fizmatlit, Moscow, 2010) [in Russian].
3. V. G. Volostnikov, Methods for Synthesis of Coherent Light Fields (Fizmatlit, Moscow, 2015) [in Russian].
4. M. Born and E. Wolf, Principles of Optics (Pergamon, New York, 1964).
5. E. Titchmarsh, Theory of Functions (Nauka, Moscow, 1980) [in Russian].