BREUNING MADSEN, H. A. J. Koolen, H. Kuipers: Agricultural soil mechanics. (Advanced series in agricultural sciences, 13). Geografisk Tidsskrift, [S. l.], v. 85, 1985. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/44097. Acesso em: 4 maj. 2024.