FERRO RAMOS, I.; LÓPEZ REYES, N. Two practical rules for forecasting the number of flares in an active region. Geofísica Internacional, [S. l.], v. 31, n. 2, p. 155–158, 1992. DOI: 10.22201/igeof.00167169p.1992.31.2.571. Disponível em: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1275. Acesso em: 3 jul. 2024.