KOWALLIS, Bart J.; SWISHER III, Carl C.; CARRANZA-CASTAÑEDA, Óscar; MILLER, Wade E.; TINGEY, David G. Fission-track and single-crystal 40Ar/39 Ar laser-fusion ages from volcanic ash layers in fossil-bearing Pliocene sediments in central Mexico. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 15, n. 2, p. 157–160, 2018. Disponível em: https://rmcg.unam.mx/index.php/rmcg/article/view/1094. Acesso em: 20 apr. 2025.