Athanasiou, Michael A., Gergios C. Anagnostopoulos, Constantinos N. David, and Gregorios G. Machairides. 2015. “The Ultra Low Frequency Electromagnetic Radiation Observed in the Topside Ionosphere above Boundaries of Tectonic Plates”. Research in Geophysics 4 (1). https://doi.org/10.4081/rg.2014.5001.