Davey, Roger J. “Dinocyst Stratigraphy of the Latest Jurassic to Early Cretaceous of the Haldager No. 1 Borehole, Denmark”. Danmarks Geologiske Undersøgelse Serie B 6 (July 30, 1982): 1–57. Accessed May 7, 2024. https://geusjournals.org/index.php/serieb/article/view/7061.