Reference

Johan Vellekoop, Henk Brinkhuis, S. Galeotti, Jan Smit, Stefan Schouten, G. J. Reichart, Robert Speijer, J. W. H. Weijers, Appy Sluijs (2011): The Aftermath of the Cretaceous-Paleogene Bolide Impact – Berichte der Geologischen Bundesanstalt – 85: 165.