1. Effects of the March 1989 solar activity;Allen;Eos Trans. AGU,1989
2. Temporal variation in the geomagnetic response to IMF sector boundary passage;Arora;J. Geophys. Res.,1981
3. The interaction between the solar wind and the magnetosphere;Axford,1967
4. A probability forecast for geomagnetic activity;Balch,1990
5. Status of the development of the Magnetospheric Specification and Forecast Model;Bales,1993