Dalhoff, Finn, Jorunn Os Vigran, and Lars Stemmerik. “Stratigraphy and Palynology of the Lower Carboniferous Sortebakker Formation, Wandel Sea Basin, Eastern North Greenland”. Geology of Greenland Survey Bulletin 187 (October 20, 2000): 51–63. Accessed November 27, 2024. https://geusjournals.org/index.php/ggub/article/view/6320.