“Precambrian Alkaline-Ultramafic Carbonatite Volcanism at Qagssiarssuk, South Greenland”. Bulletin Grønlands Geologiske Undersøgelse 84 (March 11, 1970): 1–70. Accessed November 11, 2025. https://geusjournals.org/index.php/bullggu/article/view/6624.