Corominas, Ona, and Joan Martí. “Comparative Study of Acting Plans before Volcanic Risk (Chile, Costa Rica, El Salvador, Ecuador, Spain, Mexico, and Nicaragua)”. Revista geológica de América central 52 (June 10, 2015). Accessed August 16, 2024. https://revistas.ucr.ac.cr/index.php/geologica/article/view/18980.