Jan Smit, and Henk Brinkhuis. “The Geulhemmerberg Cretaceous/Tertiary Boundary Section (Maastrichtian Type Area, SE Netherlands); Summary of Results and a Scenario of Events”. Netherlands Journal of Geosciences 75 (January 1, 1996): 283-293. Accessed April 4, 2026. https://njgjournal.nl/index.php/njg/article/view/12380.