Athanasiou, M.A., Anagnostopoulos, G.C., David, C.N. and Machairides, G.G. 2015. The ultra low frequency electromagnetic radiation observed in the topside ionosphere above boundaries of tectonic plates. Research in Geophysics. 4, 1 (Jan. 2015). DOI:https://doi.org/10.4081/rg.2014.5001.