A. Demoulin, A. Becker, G. Rixhon, R. Braucher, D. Bourlès and L. Siame (2012) “Valley downcutting in the Ardennes (W Europe): Interplay between tectonically triggered regressive erosion and climatic cyclicity”, Netherlands Journal of Geosciences, 91, pp. 79 - 90. doi: 10.1017/S0016774600001517.