1. The investigation of vegetation texture and structure;Barkman,1979
2. Competition between Erica tetralix L. and Molinia caerulea (L.) Moench as affected by the availability of nutrients;Berendse;Acta Oecol., Oecol. Plant.,1984
3. Effects of selective clipping and different mowing time on species diversity in chalk grassland;Bobbink;Folia Geobot. Phytotax.,1987
4. Effekten van luchtverontreiniging op kalkgraslandvegetaties;Bobbink;Natuurhist. Maandblad,1986
5. Increasing dominance of Brachypodium pinnatum (L.) Beauv. in chalk grasslands: a threat to a species-rich ecosystem;Bobbink;Biol. Conserv.,1987