Willems , Cees J.L., Andrea Vondrak, Harmen F. Mijnlieff, Marinus E. Donselaar, and Bart M.M. van Kempen. “Geology of the Upper Jurassic to Lower Cretaceous Geothermal Aquifers in the West Netherlands Basin – an Overview”. Netherlands Journal of Geosciences (March 19, 2020). Accessed March 27, 2026. https://njgjournal.nl/index.php/njg/article/view/11492.