Paul C. H. Veeken. “The Cenozoic Fill of the North Sea Basin (UK Sector 56-62° N), a Seismic Stratigraphic Study With Emphasis on Paleogene Massflow Deposits”. Netherlands Journal of Geosciences, vol. 75, Jan. 1996, pp. 317-40, https://njgjournal.nl/index.php/njg/article/view/12383.