1. S.-I. Akasofu, Polar and Magnetic Substorms (Reidel, Dordrecht, 1968; Mir, Moscow, 1971).
2. S.-I. Akasofu, “The Development of the Auroral Substorm,” Planet. Space Sci. 12(3), 273–282 (1964).
3. All-Sky Camera Plots of the Soviet Stations, 1971–1986, Ed. by G. V Starkov (Kola Fil. Akad. Nauk SSSR, Apatity, 1972–1987) [in Russian].
4. L. N. Baranskii, V. S. Mingalev, V. K. Roldugin, and S. A. Chernouss, “On Spectral Characteristics of Polar Irregular Pulsations,” in Antarctic Regions (Nauka, Moscow, 1974), Issue 13, pp. 12–18 [in Russian].
5. F. R. Bond and I. L. Thomas, “The Southern Auroral Oval,” Austr. J. Phys. 24(1), 97–101 (1971).