Berthelsen, Asger, and Niels Henriksen. “Geological Map of Greenland 1:100000 Ivigtut 61 V. 1 Syd, The Orogenic and Cratogenic Geology of a Precambrian Shield Area”. Meddelelser Om Grønland, vol. 186, no. 1, July 1975, p. 178 pp., https://tidsskrift.dk/meddrgroenland/article/view/152172.