HAVSKOV, J. The earthquake swarm of february 1981 in Mexico City. Geofísica Internacional, [S. l.], v. 21, n. 2, p. 157–175, 1982. DOI: 10.22201/igeof.00167169p.1982.21.2.909. Disponível em: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1166. Acesso em: 18 may. 2024.