KALSBEEK, Feiko; HERMANSEN, Bjørn; KNUDSEN, Christian; THORNING, Leif; THORSEN, Marianne. Co-operation with the Geological Survey Department of Ghana. GEUS Bulletin, Copenhagen, Denmark, v. 4, p. 93–96, 2004. DOI: 10.34194/geusb.v4.4796. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4796. Acesso em: 28 oct. 2025.