LENHART, W. No-joint concrete pipe poured continuously in trench. Materiales de Construcción, [S. l.], v. 6, n. 075, p. 40–50, 1956. DOI: 10.3989/mc.1956.v06.i075.2443. Disponível em: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2443. Acesso em: 29 mar. 2024.