Kalsbeek, F, and H.F Jepsen. “Preliminary Rb-Sr Isotope Evidence on the Age and Metamorphic History of the North Greenland Crystalline Basement”. Rapport Grønlands Geologiske Undersøgelse 99 (December 31, 1980): 107–110. Accessed November 27, 2024. https://geusjournals.org/index.php/rapggu/article/view/7677.