Delgado Granados, H., Urrutia-Fucugauchi, J., Hasenaka, T. y Ban, M. 1995. Southwestward volcanic migration in the western Trans-Mexican Volcanic Belt during the last 2 Ma. Geofísica Internacional. 34, 3 (jul. 1995), 341–352. DOI:https://doi.org/10.22201/igeof.00167169p.1995.34.3.728.