WEIGLER, H.; KARL, S. Manufacture, properties, utilisation, strength and apparent density of lightweight reinforced concrete. Materiales de Construcción, [S. l.], v. 21, n. 142, p. 71–80, 1971. DOI: 10.3989/mc.1971.v21.i142.1511. Disponível em: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1511. Acesso em: 28 apr. 2024.