K.F. Rijsdijk, S. Passchier, H.J.T. Weerts, C. Laban, R.J.W. van Leeuwen, and J.H.J. Ebbing, “Revised Upper Cenozoic stratigraphy of the Dutch sector of the North Sea Basin: towards an integrated lithostratigraphic, seismostratigraphic and allostratigraphic approach”, njg, vol. 84, pp. 129 - 146, Jul. 2005.