Irassar, Edgardo F., and Oscar R. Batic. “Sulfate Resistance of Ordinary Portland Cement With Fly Ash”. Materiales de Construcción 39, no. 213 (March 30, 1989): 11–20. Accessed March 29, 2024. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/813.