1. Boenkova, N.M., On the Planetary Distribution of the Seasonal Anomaly of the Ionospheric F2 Layer, Ionos. Issled., 1969, no. 17, pp. 87–94.
2. Bryunelli, B.E. and Namgaladze, A.A., Fizika ionosfery (Physics of the Ionosphere), Moscow: Nauka, 1988.
3. Deminov, M.G. and Fishchuk, Ya.A., On the Use of the Geomagnetic Field Approximation by the Eccentric Dipole in Problems of Ionosphere and Plasmasphere Modeling, Geomagn. Aeron., 2000, vol. 40, no. 3, pp. 119–123 [Geomagn. Aeron. (Engl. transl.), 2000, vol. 40, pp. 383–387].
4. Johnson, N. and Lyon, F., Statistika i planirovanie eksperimenta v tekhnike i nauke. Metody obrabotki dannykh (Experimental Statistics and Planning in Engineering and Science: Data Processing Methods), Moscow: Mir, 1980.
5. Fatkullin, M.N., Boenkova, N.M., Legen’ka, A.D., and Muradov, A., Vertical-Latitudinal Development of the Seasonal Anomaly in the Daytime F2 Layer. I, Geomagn. Aeron., 1973, vol. 13, no. 4, pp. 640–646.