Ishkov, V. N. (1998), Emerging magnetic fluxes: a key to prediction of large solar flares, Izv. RAN. Ser. fiz., 62, (9), 1835.

Ishkov, V. N. (2003), The current 23 cycle of solar activity: its evolution and principal features, in: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, p. 103, ESA Publications Division, ESA SP-535, Noordwijk.

Ishkov, V. N. (2005), Properties of the current 23-rd solar activity cycle, Solar System Res., 39, (6), 1, doi:10.1007/s11208-005-0058-6. [CrossRef]

Joselyn, (1986), SESC methods for short-term geomagnetic prediction, in: Solar-Terrestrial Predictions: Proceedings of a Workshop at Meudon, France, June 18-22, 1984, p. 404, Edited by P. A. Simon, G. Heckman, and M. A. Shea, NOAA, Boulder, CO.

McAllister, A. H., M. Dryer, P. McIntosh, H. Singer, and L. Weiss (1995), A quiet CME and a severe geomagnetic storm: April 14-17, 1994, Proc. of the 2nd SOLTIP Symposium, GBRSC News, (5), 191.

Obashev, S. O., and M. Dryer, et al. (1973), Solar activity, in: Tr. Astrofiz. Inst. (in Russian), 23, p. 103, Nauka, Alma-Ata.

Panasyuk, M. I., and M. Dryer, et al. (2006), Radiation conditions in space (in Russian), 132 pp., Biblion - Russian Book, Moscow.

Solodyna, C. V., A. S. Krieger, and J. T. Nolte (1977), Observations of the birth of a small coronal hole, Solar Phys., 54, (1), 123, doi:10.1007/BF00146428. [CrossRef]

Watari, S. I. (1990), The latitudinal distribution of coronal holes and geomagnetic storms, in: Proceeding of the Solar-Terrestrial Predictions Workshop, 1, p. 627, NSO, Leura, Australia.