1. Axford W. I., On the origin of radiation belt and auroral primary ions, in Particles and Fields in the Magnetosphere, edited by B. M. McCormac, pp. 46–59, Reidel, Dordrecht, 1970.
2. Blake, J. B., J. F. Fennell, M. Schulz, and G. A. Paulikas, Geomagnetically trapped alpha particles, 2, The inner zone, J. Geophys. Res., 78, 5498–5506, 1973.
3. Burton, R. K., R. L. Mcpherron, and C. T. Russell, An empirical relationship between interplanetary conditions and D
st J. Geophys. Res., 80, 4204–4214, 1975.
4. Chen, A. J. and D. P. Stern, Adiabatic Hamiltonian of charged particle motion in a dipole field, J. Geophys. Res., 80, 690–693, 1975.
5. Chiu, Y. T., J. M. Cornwall, J. G. Luhmann, and M. Schulz, Argon-ion contamination of the plasmasphere, in Space Systems and Their Interactions with Earth’s Space Environment, edited by H. B. Garrett and C. P. Pike, pp. 118–147, AIAA, New York, 1980.