1. Kovtyukh, A.S., Geocorona of Hot Plasma, Kosm. Issled., 2001, vol. 39, no. 6, pp. 563–596. [Cosmic Research, pp. 527–558].
2. Kovtyukh, A.S., Ring Current, in Model’ kosmosa (A Model of Cosmos), Eds. M.I. Panasyuk and L.S. Novikos, Moscow: Biblion-Russkaya kniga, 2006, vol. 1, pp. 482–517.
3. Kovtyukh, A.S. and Panasyuk, M.I., Storm Ring Current, in Plazmennaya geliogeofizika (Plasma Heliogeophysics), Zelenyi, L.M and Veselovsky, I.S., Eds., Moscow: Fizmatlit, 2008, vol. 1, pp. 534–552.
4. Smith, P.H. and Hoffman, R.A., Ring Current Particle Distributions during the Magnetic Storms of December 16–18, 1971, J. Geophys. Res., 1973, vol. 78, no. 22, pp. 4731–4737.
5. Fritz, T.A., Smith, P.H., Williams, D.J., et al., Initial Observations of Magnetospheric Boundaries by Explorer 45 (S3), in Correlated Interplanetary and Magnetospheric Observations, Page, D.E., Ed., Dordrecht-Holland: D. Reidel, 1974, pp. 485–506.