Moreno Arús, Fernando, and Julio Pérez Alonso. “Contribution to the Determination of Gypsum and Hemihydrates Content in Portland Cements”. Materiales de Construcción 25, no. 159 (September 30, 1975): 43–45. Accessed April 30, 2024. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1260.