Upton, Brian G. J. “The Geology of Tugtutôq and Neighbouring Islands, South Greenland. Part III: Olivine Gabbros, Syeno-Gabbros and Anorthosites”. Meddelelser Om Grønland, vol. 169, no. 3, Dec. 1964, pp. 1-47, https://tidsskrift.dk/meddrgroenland/article/view/160424.