Rosenbauer, H. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Trattner, K. J., Coates, A. J., Fazakerley, A. N., Johnstone, A. D., Balsiger, H., Burch, J. L., et al. (1998). Overlapping ion populations in the cusp: Polar/TIMAS results. Geophysical Research Letters, 25, 1621-1624.