Gunnink , J.L., D. Maljers, S.F. van Gessel, A. Menkovic, and H.J. Hummelman. 2014. “Digital Geological Model (DGM): A 3D Raster Model of the Subsurface of the Netherlands”. Netherlands Journal of Geosciences, March, 33-46. https://doi.org/10.1017/S0016774600000263.