M.P. Hijma, K.M. Cohen, G. Hoffmann, A.J.F. Van der Spek, and E. Stouthamer. 2009. “From River Valley to Estuary: The Evolution of the Rhine Mouth in the Early to Middle Holocene (western Netherlands, Rhine-Meuse Delta)”. Netherlands Journal of Geosciences 88 (March):13 - 53. https://doi.org/10.1017/S0016774600000986.