FERRUSQUÍA-VILLAFRANCA, I. Part I: Introduction and fauna of the Northwest and Central Mexico. Paleontología Mexicana, [S. l.], n. 56, p. 7–56, 1990. DOI: 10.22201/igl.05437652e.1990.0.56.365. Disponível em: https://paleontologiamexicana.geologia.unam.mx/index.php/paleontologia/article/view/365. Acesso em: 1 jul. 2025.