APPLEGATE, Shelton P. The El Cien Formation-strata of Oligocene and early Miocene age in Baja California Sur. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 6, n. 2, p. 145–162, 2019. Disponível em: https://www.rmcg.unam.mx/index.php/rmcg/article/view/1328. Acesso em: 25 may. 2025.