Soria Santamaría, F., and A. Núñez Recuela. “Extracts from Technical Journals”. Materiales de Construcción 25, no. 160 (December 30, 1975): 97–133. Accessed February 24, 2025. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1257.