Papenmeier, S, Schrottke, K, Bartholomä, A and Flemming, BW (2013) Sedimentological and rheological Properties of the water–solid bed interface in the Weser and Ems estuaries, North Sea, Germany: Implications for fluid mud classification. Journal of Coastal Research, 289. 797-808. doi:10.2112/JCOASTRES-D-11-00144.1