Gunnink J., Maljers D., van Gessel S., Menkovic A. and Hummelman H. 2014. Digital Geological Model (DGM): a 3D raster model of the subsurface of the Netherlands. Netherlands Journal of Geosciences. (Mar. 2014), 33-46. DOI:https://doi.org/10.1017/S0016774600000263.