1. Veld types of South Africa;Acocks;Memoirs of the Botanical Survey of South Africa,1953
2. Veld Types of South Africa;Acocks,1988
3. Selective use of heuweltjie earth mounds by sheep in the Karoo;Armstrong;South African Journal of Ecology,1990
4. Does resource availability, resource heterogeneity or species turnover mediate changes in plant species richness in grazed grasslands?;Bakker;Oecologia,2003
5. Rethinking range ecology: implications for range management in Africa;Behnke,1993