BESLER, H. Beobachtungen zum Casiquiare-Problem. ERDKUNDE, [S. l.], v. 49, n. 2, p. 152–156, 1995. DOI: 10.3112/erdkunde.1995.02.05. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/2319. Acesso em: 7 oct. 2024.