Munsterman , D., Verreussel , R., Mijnlieff , H., Witmans , N., Kerstholt-Boegehold , S., & Abbink , O. (2014). Revision and update of the Callovian-Ryazanian Stratigraphic Nomenclature in the northern Dutch offshore, i.e. Central Graben Subgroup and Scruff Group. Netherlands Journal of Geosciences, 91, 555-590. https://doi.org/10.1017/S001677460000038X