Hagfors, T. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Grydeland, T., La Hoz, C., Hagfors, T., Blixt, E. M., Saito, S., Strømme, A., et al. (2003). Interferometric observations of filamentary structures associated with plasma instability in the auroral ionosphere. Geophysical Research Letters, 30: 1338. doi:10.1029/2002GL016362.