Vermaat, J.E.; Broekx, S.; Van Eck, B.; Engelen, G.; Hellmann, F.; De Kok, J.L.; Van der Kwast, H.; Maes, J.; Salomons, W.; Van Deursen, W. (2012). Nitrogen source apportionment for the catchment, estuary, and adjacent coastal waters of the river Scheldt. Ecol. Soc. 17(2): 30. http://dx.doi.org/10.5751/ES-04889-170230, meer
Vermaat, J.E.; Salomons, W.; Gilbert, A.J.; Hellmann, F. (2009). Articulating SRES-scenarios for use in integrated modelling of land use, hydrology and nitrogen budgets of the Scheldt catchment. Institute for Environmental Studies: Amsterdam. 8, tab., fig. pp., meer
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