CHRISTIANSEN, F. G. Review of Survey activities 2009. GEUS Bulletin, Copenhagen, Denmark, v. 20, p. 1–8, 2010. DOI: 10.34194/geusb.v20.4887. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4887. Acesso em: 28 sep. 2022.