L. E. Ortiz-Hernández, K. Flores-Castro, and O. A. Acevedo-Sandoval, “Petrographic and geochemical characteristics of upper Aptian calc-alkaline volcanism in San Miguel de Allende, Guanajuato state, Mexico”, revmexcg, vol. 19, no. 2, pp. 81–90, Jun. 2018.