Search for: [References = "7. De Ploey J., 1985. The origin of modern and old colluvium in the light of a colluviation model \[in\:\] M. Van Molle, L. Peeters \(eds.\), Recent trends in physical geography in Belgium. Study series of the Vrije Universiteit Brussel, New Series, vol. 20, pp. 157\-171."]