Koshevaya, S.V, R. Pérez-Enríquez, y N.Ya Kotsarenko. 1997. «The Detection of Electromagnetic Processes in the Ionosphere Caused by Seismic Activity». Geofísica Internacional 36 (1):55-60. https://doi.org/10.22201/igeof.00167169p.1997.36.1.349.