J. Cabrera-Román, J. Castro-Segura, G. Valdez-Moreno, and J. L. Arce-Saldaña, “Ñadó volcanic complex, north of Acambay graben: evidence of Oligocene magmatism and its relation with the central sector of the Trans-Mexican Volcanic Belt: Español”, revmexcg, vol. 36, no. 1, pp. 76–94, Mar. 2019.