MACGEE, J. J.; TILLING, R. I.; DUFFIELD, W. A. Petrologic characteristics of the 1982 and pre-1982 eruptive products of el Chichon Volcano, Chiapas, México. Geofísica Internacional, [S. l.], v. 26, n. 1, p. 85–108, 1987. DOI: 10.22201/igeof.00167169p.1987.26.1.1190. Disponível em: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1080. Acesso em: 20 mar. 2025.