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;
Krymskii, A. M., Breus, T., & Nielsen, E. (1995). On possible observational evidence in electron density profiles of a magnetic field in the Martian ionosphere. Journal Geophysical Research, 100, 3721-3730.