Richardt, Patrick Alexander, and Emma Sheldon. “Palynological and Microfossil Biostratigraphy and Palaeoecology over the Paleocene–Eocene Transition, Femern Bælt, Northern Germany”. GEUS Bulletin 31 (June 25, 2014): 35–38. Accessed December 9, 2021. https://geusbulletin.org/index.php/geusb/article/view/4655.