1. On weathering and denudation of humid tropical interfluves and their triple planation surfaces;Aleva;Geol. Mijnbouw,1983
2. Drainage geochemistry in tropical rain forest terrains;Appleton,1994
3. The nature of saltation and of “bed-load” transport in water;Bagnold,1973
4. Climatic Geomorphology;Budel,1982
5. The forest environment: soils;Burnham,1984