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;
Mazaudier, C., Blanc, M., Nielsen, E., & Zi, M. (1984). Latitudinal profile of the magnetospheric convection electric field at ionospheric altitdes from a chain of magnetic and radar data. Journal Geophysical Research, 89, 375.