1. Forbush, S.E., Phys. Rev., 1946, vol. 70, p.771.
2. Gosling, J.T., J. Geophys. Res., 1993, vol. 98, p. 18937.
3. Mobius, E., Cao, Y., Popecki, M.A., Kistler, L.M., Kucharek, H., Morris, D., and Klecker, B., Proc. 28th Int. Cosmic Ray Conference, Tsukuba, Japan, 2003, vol. 6, p. 3273.
4. Klecker, B., Mobius, E., Popecki, M.A., Kistler, L.M., Kucharek, H., and Hilchenbach, M., Adv. Space Res., 2006, vol. 38, no. 3, p.493.
5. Hasebe, N., Matsumoto, H., Koshiishi, H., Goka, T., Fugii, M., and Hasebe, N., Proc. 28th Int. Cosmic Ray Conference, Tsukuba, Japan, 2003, p. 3469.