Quataert, P.; Verschelde, P.; Breine, J.; Verbeke, G.; Goetghebeur, E.; Ollevier, F. (2011). A diagnostic modelling framework to construct indices of biotic integrity: A case study of fish in the Zeeschelde estuary (Belgium). Est., Coast. and Shelf Sci. 94(3): 222-233. dx.doi.org/10.1016/j.ecss.2011.06.014, more