“The Søby Flora: Fossil Plants from the Middle Miocene Delta Deposits of the Søby-Fasterholt Area, Central Jutland, Denmark. Part II”. Danmarks Geologiske Undersøgelse II. Række 108 (September 17, 1976): 1–49. Accessed March 18, 2026. https://geusjournals.org/index.php/raekke2/article/view/6899.