Vargemezis, G.; Zlotnicki, J.; Tsokas, G.; Papazachos, B. C.; Papadimitriou, E. E. Monitoring of the Geomagnetic and Geoelectric Field in Two Regions of Greece for the Detection of Earthquake Precursors. Ann. Geophys. 1997, 40 (2). https://doi.org/10.4401/ag-3916.