Walton, B. J. (1965) “Sanerutian Appinitic Rocks and Gardar Dykes and Diatremes, North of Narssarssuaq, South Greenland”., Meddelelser om Grønland, 179(9), p. 70 pp. Available at: https://tidsskrift.dk/meddrgroenland/article/view/155280 (Accessed: 28 December 2025).