Munsterman , Dirk K., and Jef Deckers. “Cross-Border Correlations Showing Diachronous Lithostratigraphic Units in the Southeastern North Sea Basin During the Early Oligocene (middle-Late Rupelian)”. Netherlands Journal of Geosciences 103 (May 13, 2024). Accessed March 26, 2026. https://njgjournal.nl/index.php/njg/article/view/10837.