Aguirre-Díaz, Gerardo J. “Volcanic Stratigraphy of the Amealco Caldera and Vicinity, Central Mexican Volcanic Belt”. Revista Mexicana De Ciencias Geológicas, vol. 13, no. 1, Jan. 2019, pp. 10-51, https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1135.