POLO, Gerardo. On maritime transport costs, evolution, and forecast. Ship science & technology, [S. l.], v. 5, n. 10, p. 19–31, 2012. DOI: 10.25043/19098642.57. Disponível em: https://shipjournalco.biteca.online/index.php/sst/article/view/57. Acesso em: 15 mar. 2025.