Besch , T., S. P. Verma, U. Kramm, J. F. W. Negendank, H. J. Tobschall, y R. Emmermann. «Assimilation of Sialic Crustal Material by Volcanics of the Easternmost Extension of the Trans-Mexican Volcanic Belt Evidence from Sr and Nd Isotopes». Geofísica Internacional, vol. 34, n.º 3, julio de 1995, pp. 263-81, doi:10.22201/igeof.00167169p.1995.34.3.716.