Moreno, E., R. Solis, and L. Apostela y Pardo. “Characterization of the Popocatepetl volcano´s Ash and Its Application As Cementing Material in Its Natural Condition”. Revista Ingeniería De Construcción, vol. 19, no. 3, Dec. 2004, https://revistaingenieriaconstruccion.uc.cl/index.php/ric/article/view/17389.