1. Veld types of South Africa;Acocks;Mem. bot. Surv. S. Afr.,1988
2. Genetic components of heterocarpy in Microsaris Hybrid B87 (Asteraceae, Lactuceae);Bachmann;Pl. Syst. Evol.,1984
3. Competitive interference of plant species in monocultures and mixed stands;Baeumer;Neth. J. agric. Sci.,1968
4. Phenological events and their environmental triggers in the Mojave desert ecosystems;Beatley;Ecology,1974
5. Fruit polymorphism in ephemeral species of Namaqualand;Beneke,1991