1. Baeyens W., Monteny F. (1988), Study of the degree of contamination of dredge in the Scheldt estuary (in Dutch). Synthesis report. University of Brussels, Belgium.
2. Wartel S. (1977), Geologie en Mijnbouw, 56, 219–233
3. Van Eck, G.T.M. (1991), The development of a water quality model for the Scheldt estuary (in dutch), Water (Belgium), 61, 215–218
4. Baeyens W., B. van Eck, C. Lambert, R. Wollast. (in press), General description of the Scheldt river basin, in: Trace metals in the Westerschelde estuary: a case-study of a polluted,partially anoxic estuary, W. Baeyens (Ed.), Kluwer Publishers, Dordrecht.
5. Andersen J., Niilonen T. (Eds) (1995), Progress Report, 4th International Conference on the Protection of the North Sea, Danish EPA, Copenhagen, Denmark, 247pp.