Mejía, Johanna, Erich D. Rodríguez, and Ruby Mejía de Gutiérrez. “Potential Utilization of a Low Quality-Fly Ash As an Aluminosilicate Source in the Production of Geopolymers”. Ingenieria y Universidad 18, no. 2 (November 20, 2014): 309 - 328. Accessed April 19, 2021. https://revistas.javeriana.edu.co/index.php/iyu/article/view/5887.