Balling, N.P. “Geothermal Models of the Crust and Uppermost Mantle of the Fennoscandian Shield in South Norway and the Danish Embayment”. Journal of Geophysics 42, no. 1 (April 8, 1976): 237-256. Accessed October 3, 2025. https://journal.geophysicsjournal.com/JofG/article/view/254.