FILKORN, Harry F.; SCOTT, Robert W. Microfossils, paleoenvironments and biostratigraphy of the Mal Paso Formation (Cretaceous, upper Albian), State of Guerrero, Mexico. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 28, n. 1, p. 175–191, 2018. Disponível em: https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/619. Acesso em: 18 apr. 2025.