Mall, U. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society; Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;
Christon, S. P., Mall, U., Eastman, T., Gloeckler, G., Lui, A. T. Y., McEntire, R. W., et al. (2002). Solar cycle and geomagnetic N+/O+ variation in the outer dayside magnetosphere: Possible relation to topside ionosphere. Geophysical Research Letters, 29(5): 1058. doi:10.1029/2001GL013988.