Hagfors, T. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Buchert, S. C., Hagfors, T., & McKenzie, J. F. (2006). Effect of electrojet irregularities on DC current flow. Journal Geophysical Research, 111(A2): A02305. doi:10.1029/2004JA010788.