Pérez Enríquez, R., Miroshnichenko, L., Rodríguez Taboada, R. E., & Méndez Berhondo, A. (2000). Solar-terrestrial response to large extension or long-duration solar gamma ray events. Geofísica Internacional, 39(1), 87–92. https://doi.org/10.22201/igeof.00167169p.2000.39.1.301