, Amat i Tarruella, J.; Trepat i Felip, F. “Construction Material Databases: Prefabricated Estructural Elements and the Technical Cards”. Hormigón y Acero 47, no. 199 (January 1, 1996). Accessed May 19, 2024. http://www.hormigonyacero.com/index.php/ache/article/view/496.