1. The use of tetrazolium salts in bioautographic procedures;Begue;Journal of Chromatography,1972
2. Seasonal variation in cotyledoside concentration of Tylecodon wallichii (Harv.) Tolken subsp. wallichii sampled in a krimpsiekte-prevalent region;Botha;Onderstepoort Journal of Veterinary Research,2001
3. Chemosystematic studies of the genus Combretum (Combretaceae). 1. A convenient method of identifying species of this genus by a comparison of the polar constituents extracted from leaf material;Carr;South African Journal of Botany,1987
4. Trees of Southern Africa;Coates Palgrave,1977
5. Introduction and overview;Colegate,1993