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;
Uspensky, M. V., Kustov, A. V., Williams, P. J. S., Huuskonen, A., Kangas, J., & Nielsen, E. (1989). Effects of unresolved electrojet microstructure on measurements of irregularity drift velocity in auroral radar backscatter. Advances in Space Research, 9, 5119.