1. Borrini, G., Wilcox, J.M., Gosling, J.T., Bame, S.J., and Feldman, W.C.: 1981, J. Geophys. Res. 86, 4565.
2. Cane, H.V. and Richardson, I.G.: 2003, J. Geophys. Res. 108(A4), 1156.
3. Cho, K.-S., Moon, Y.-J., Dryer, M., Fry, C.D., Park, Y.-D., and Kim, K.-S.: 2003, J. Geophys. Res. 108(A12), 1445.
4. Echer, E. and Gonzalez, W.D.: 2004, Geophys. Res. Lett. 31, L09808.
5. Fry, C.D., Dryer, M., Smith, Z., Sun, W., Deehr, C.S., and Akasofu, S.-I.: 2003, J. Geophys. Res. 108(A2), 1070.