1. Zherebtsov, G.A., Mizun, Yu.G., and Mingalev, V.S., Fizicheskie protsessy v polyarnoi ionosfere (Physical Processes in the Polar Ionosphere), Moscow: Nauka, 1988.
2. Despirak, I.V., Kozelova, T.V., Kozelov, B.V., and Lubchich, A.A., J. Atmos. Sol.-Terr. Phys., 2020, vol. 206, 105325.
3. Shubin, V.N., Geomagn. Aeron., 2017, vol. 57, no. 4, p. 414.
4. Kravtsov, Yu.A. and Orlov, Yu.I., Geometricheskaya optika neodnorodnykh sred (Geometric Optics of Inhomogeneous Media), Moscow: Nauka, 1980.
5. Kolesnik, A.G., Volny v okolozemnoi plazme (Waves in Near-Earth Plasma), Tomsk: TML, 2007.