1. Fleming, J. A., 1936. Notes on radio fade-out of August 25, 1986.Terr. Magn.,41, 404–406.
2. Kane, R. P., 1976. Geomagnetic field variations.Space Science Rev. 18, 4, 413–540.
3. Kuwashima, M. and Uwai, T., 1985. Solar flare effect on the magnetic variations.Mem. Kakioka Mag. Obs.,21, 1, 1–14.
4. Matsushita, S. and Campbell, W. H., 1967.Physics of Geomagnetic Phenomena, 1398pp. Academic Press, New York and London.
5. Ohshio, M., Fukushima, N. and Nagata, T., 1963. Solar flare effect on geomagnetic variation, Rept. Ionosph.Space Res., Japan,17, 77–114.