PÉREZ-RAMOS, Olivia; NESTELL, Merlynd. Permian fusulinids from Cobachi, central Sonora, Mexico. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 19, n. 1, p. 25–37, 2018. Disponível em: https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/983. Acesso em: 16 apr. 2025.