1. Bryunelli, B.E. and Namgaladze, A.A., Fizika ionosfery (Ionospheric Physics), Moscow: Nauka, 1988.
2. Buchachenko, A.L., Oraevskii, V.N., Pokhotelov, O.A., et al., Ionospheric Precursors to Earthquakes, Phys.-Usp., 1996, vol. 166, no. 9, pp. 959–966.
3. Chernyavskii, G.M., Skrebushevskii, B.S., and Skripachev, V.O., Airborne Equipment of Space Probes for Monitoring Precursors to Earthquakes, Issled. Zemli Kosmosa, 2004, no. 6, pp. 50–58.
4. Davis, K., Ionospheric Radio Waves, Waltham, MA: Blaisdell, 1969.
5. Fatkullin, M.N., Zelenova, T.I., Kozlov, V.K., et al., Empiricheskie modeli sredneshirotnoi ionosfery (Empirical Models of Midlatitude Ionosphere), Moscow: Nauka, 1981.