Therkelsen, Jens, and Finn Surlyk. “The Fluviatile Bristol Elv Formation, a New Middle Jurassic Lithostratigraphic Unit from Traill Ø, North-East Greenland”. GEUS Bulletin 5 (November 1, 2004): 19–29. Accessed October 21, 2025. https://geusbulletin.org/index.php/geusb/article/view/4801.