Ríos, C., Williams, C. and Castellanos, O. 2011. Hydrothermal treatment at low temperature of a clinoptilolite-rich tuff in NaOH, KOH and Ca(OH) solutions. Ingeniería y Competitividad. 13, 1 (Jul. 2011), 131–139. DOI:https://doi.org/10.25100/iyc.v13i1.2687.