Petersen, Henrik I., Jan Andsbjerg, Jørgen A. Bojesen-Koefoed, Hans P. Nytoft, and Per Rosenberg. “Petroleum Potential and Depositional Environments of Middle Jurassic Coals and Non-Marine Deposits, Danish Central Graben, With Special Reference to the Søgne Basin”. Geology of Denmark Survey Bulletin 36 (August 18, 1998): 1–80. Accessed April 28, 2024. https://geusjournals.org/index.php/dgub/article/view/6204.