Jan K. Nielsen, S. Helama, D. Rodland, and Jasper K. Nielsen. 2007. “Eemian Marine Mollusks and Barnacles from Ristinge Klint, Denmark: Hydrodynamics and Oxygen Deficiency”. Netherlands Journal of Geosciences 86 (July):95 - 115. https://doi.org/10.1017/S0016774600023118.