O.A. Abbink, J.H.A. Van Konijnenburg-Van Cittert, C.J. Van der Zwan, and H. Visscher. “A Sporomorph Ecogroup Model for the Northwest European Jurassic - Lower Cretaceous II : Application to an Exploration Well from the Dutch North Sea”. Netherlands Journal of Geosciences 83 (June 1, 2004): 81-91. Accessed March 26, 2026. https://njgjournal.nl/index.php/njg/article/view/11546.