Ponce Lira, B., Ortiz Polo, A., Otazo Sánchez, E. M., Reguera Ruiz, E., Acevedo Sandoval, O. A., Prieto Garcia, F., & Gonzalez Ramírez, C. A. (2013). Physical characterization of an extensive volcanic rock in México: “red tezontle” from Cerro de la Cruz, in Tlahuelilpan, Hidalgo, Mexico. Acta Universitaria, 23(4), 9-16. https://doi.org/10.15174/au.2013.462