1. Alissandrakis, C.E., Kundu, M.R.: 1982, Astrophys. J. Lett. 253, L49.
2. Alissandrakis, C.E., Gelfrejkh, G.B., Borovik, V.N., Korzhavin, A.N., Bogod, V.M., Nindos, A., Kundu, M.R.: 1993, Astron. Astrophys. 270, 509.
3. Akhmedov, S.B., Borovik, V.N., Gelfreikh, G.B., Bogod, V.M., Korzhavin, A.N., Petrov, Z.E., Dikij, V.N., Lang, K.R., Willson, R.F.: 1986, Astrophys. J. 301, 460.
4. Akhmedov, Sh.B., Bogod, V.M., Borovik, V.N., Gelfreikh, G.B, Korzhavin, A.N.: 1987, Solar maximum analysis. In: Stepanov, V.E., Obridko, V.N. (eds.) Proceedings of the International Workshop, VNU Science Press, Utrecht, 51.
5. Bogod, V.M., Yasnov, L.V.: 2009, Astrophys. Bull. 64, 372.