Schlegel, K. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Link (beliebiger Volltext)
Voiculescu, M., Haldoupis, C., Pancheva, D., Ignat, M., Schlegel, K., & Shalimov, S. (2000). More evidence for a planetary wave link with midlatitude E region coherent backscatter and sporadic E layers. Annales Geophysicae, 18(9), 1182-1196.