Lewis, Claudia J. «Stratigraphy and Geochronology of Miocene and Pliocene Volcanic Rocks in the Sierra San Fermín and Southern Sierra San Felipe, Baja California, Mexico». Geofísica Internacional 35, no. 1 (enero 1, 1996): 3–25. Accedido abril 28, 2024. http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/537.