John W.M. Jagt (1996) “Late Maastrichtian and Early Palaeocene index macrofossils in the Maastrichtian type area (SE Netherlands, NE Belgium)”, Netherlands Journal of Geosciences, 75, pp. 153-162. Available at: https://njgjournal.nl/index.php/njg/article/view/12368 (Accessed: 4April2026).