Bernstein, Stefan, and Christian Knudsen. “Epithermal Gold and Massive Sulphide Mineralisation in Oil Impregnated Palaeogene Volcanic Rocks of Ubekendt Ejland, West Greenland”. GEUS Bulletin 4 (July 20, 2004): 77–80. Accessed May 20, 2022. https://geusbulletin.org/index.php/geusb/article/view/4790.