BARRAGÁN-MANZO, Ricardo; MÉNDEZ-FRANCO, Ana Laura. Towards a standard ammonite zonation for the Aptian (Lower Cretaceous) of northern Mexico. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 22, n. 1, p. 39–47, 2018. Disponível em: https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/872. Acesso em: 18 apr. 2025.