Sagrera, J. L., and B. Bacle. “Determination of Chlorine in Concretes by X Ray Fluorescence Methods”. Materiales de Construcción 17, no. 125 (March 31, 1967): 47–52. Accessed April 26, 2024. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1666.