Birkelund, T., & Heinberg, C. (1975). Facies variation and trace fossil assemblages of the Vardekløft and Olympen Formations of Jameson Land and Scoresby Land, central East Greenland. Rapport Grønlands Geologiske Undersøgelse, 75, 100–103. https://doi.org/10.34194/rapggu.v75.7461