Upton, B.G.J. “Geology of Tugtutôq and Neighbouring Islands, South Greenland. Part I”. Bulletin Grønlands Geologiske Undersøgelse 34 (October 16, 1962): 1–60. Accessed July 3, 2024. https://geusjournals.org/index.php/bullggu/article/view/6568.