Nielsen, E. 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;
Theile, B., Maurer, H., Nielsen, E., Greenwald, R. A., & Ranta, A. (1980). Ground-based observations of an isolated substorm. Planetary and Space Science, 28, 763.