Guerrero-García, J.C. y Urrutia-Fucugauchi, J. 1995. Magnetostratigraphy of a late oligocene volcanic sequence, durango, sierra madre occidental, northern México. Geofísica Internacional. 34, 1 (ene. 1995), 23–31. DOI:https://doi.org/10.22201/igeof.00167169p.1995.34.1.1270.