Rothkaehl, H., N. Izohkina, N. Prutensky, S. Pulinets, M. Parrot, G. Lizunov, J. Blecki, and I. Stanislawska. 2004. “Ionospheric Disturbances Generated by Different Natural Processes and by Human Activity in Earth Plasma Environment”. Annals of Geophysics 47 (2-3 Sup.). https://doi.org/10.4401/ag-3295.