Bridgwater, D., H. Austrheim, B. T. Hansen, F. Mengel, S. Pedersen, and J. Winter. 1990. “The Proterozoic Nagssugtoqidian Mobile Belt of Southeast Greenland: A Link Between the Eastern Canadian and Baltic Shields”. Geoscience Canada 17 (4). https://journals.lib.unb.ca/index.php/GC/article/view/3711.