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