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;
Poulter, E. M., & Nielsen, E. (1982). The interpretation of gound-based observations of energetic electron fluxes modulated by Pc5 hydromagnetic oscillations. Journal Geophysical Research, 87, 2549.