CORDON, W. A. Specification of minimum strengths may be useful. Materiales de Construcción, [S. l.], v. 21, n. 141, p. 37–45, 1971. DOI: 10.3989/mc.1971.v21.i141.1517. Disponível em: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1517. Acesso em: 2 may. 2024.