BALATON, J. UNTERSUCHUNG DES ZUGKRAFTBEDARFS DER UNTERGRUNDLOCKERER. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 15, n. 4, p. 441–460, 1971. Disponível em: https://pp.bme.hu/me/article/view/6089. Acesso em: 3 jul. 2024.