Moreno, Eric, Romel Solis, and Luis Apostela y Pardo. 2004. “Characterization of the Popocatepetl volcano´s Ash and Its Application As Cementing Material in Its Natural Condition”. Revista Ingeniería De Construcción 19 (3). https://ojs.uc.cl/index.php/ric/article/view/17389.