NIELSEN, L. H. .; MATHIESEN, A. .; BIDSTRUP, T. . Geothermal energy in Denmark. GEUS Bulletin, Copenhagen, Denmark, v. 4, p. 17–20, 2004. DOI: 10.34194/geusb.v4.4771. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4771. Acesso em: 19 oct. 2021.