SPJELDNÆS, Niels. Sahara – en kold omgang. Varv, [S. l.], v. 1971, n. 4, p. 104–113, 1971. DOI: 10.7146/varv.v1971i4.150876. Disponível em: https://tidsskrift.dk/varv/article/view/150876. Acesso em: 8 dec. 2025.