1. Palaeohydrological development in the southern Netherlands during the last 15000 years;Bohncke,1991
2. Sediment transportation;Brown,1950
3. Klima-Geomorphologie;Büdel,1977
4. Drainage density and streamflow;Carlston;U.S. Geological Survey Professional Paper,1963
5. de Vries, J.J., 1974. Ground water systems and stream nets is the Netherlands. PhD thesis, Vrije Universteit Amsterdam, Amsterdam.