1. Competiton in heathland along an experimental gradiet of nutrient availability;Aerts;Oikos,1990
2. Deterioration of atlantic soft-water systems and their flora, a historical account;Arts,1990
3. Successional changes in the soft-water macrophyte vegetation of (sub)atlantic, sandy, lowland regions during this century;Arts;Freshwater Biol.,1990
4. The catastrophic death of Calluna vulgaris in Dutch heathlands;Berdowski,1987
5. The effect of external stress and disturbance factors on Calluna-dominated heathland vegetation;Berdowski,1993