1. G. I. Makarov, V. V. Novikov, and S. T. Rybachek, Distribution of Electromagnetic Waves over the Land Surface (Nauka, Moscow, 1991).
2. G. I. Makarov, V. V. Novikov, and S. T. Rybachek, Distribution of Radio Waves in a Waveguide Earth-Ionosphere and in an Ionosphere (Nauka, Moscow, 1993).
3. A. N. Kazantsev, D. S. Lukin, and Yu. G. Spiridonov, Kosmich. Issled. 5, 593 (1967).
4. Yu. G. Spiridonov and D. S. Lukin, Izv. Vyssh. Uchebn. Zaved. Radiofiz. 12 (12), 1769 (1969).
5. A. S. Kryukovsky and D. S. Lukin, J. Commun. Technol. Electron. 64, 1224 (2019).