KEIL, F. Diagram of strength increase, and original strength. Materiales de Construcción, [S. l.], v. 16, n. 121, p. 35–40, 1966. DOI: 10.3989/mc.1966.v16.i121.1719. Disponível em: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1719. Acesso em: 3 may. 2024.