Helium in the thermal springs of Ûnartoq, South Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 44, p. 1–21, 1972. DOI: 10.34194/rapggu.v44.7284. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/7284. Acesso em: 31 oct. 2025.