Journal articles
2012
- . (2012). Devil's Claw—A review of the ethnobotany, phytochemistry and biological activity of Harpagophytum procumbens. Journal Of Ethnopharmacology, 143(3), 755 - 771. http://doi.org/10.1016/j.jep.2012.08.013 (Original work published 10/2012AD)
- . (2012). Differential signaling involved in Sutherlandia frutescens-induced cell death in MCF-7 and MCF-12A cells. Journal Of Ethnopharmacology, 140(1). http://doi.org/10.1016/j.jep.2011.12.045 (Original work published 3/2012AD)
- . (2012). Distichamine, a chemotaxonomic marker for the genus Boophone Herb. (Amaryllidaceae). South African Journal Of Botany, 83. http://doi.org/10.1016/j.sajb.2012.07.024 (Original work published 11/2012AD)
1981
- . (1981). Devils claw (Harpagophytum procumbens): pharmacological and clinical studies. Annals Of The Rheumatic Diseases, 40(6). Retrieved from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1000848/?page=1 (Original work published 1981)
- . (1981). Dihydromyricetin 3-O-rhamnoside from leaves of Catha edulis. Phytochemistry, 20(7). http://doi.org/10.1016/S0031-9422(00)98579-0 (Original work published 1/1981AD)
1967
- . (1967). Die Cardenolide von Acokanthera oppositifolia (LAM.) CODD. 3. Mitteilung . Isolierung weitere Cardenolide und teilweise Strukturaufklärung. Glykoside und Aglykone, 301. Mitt. Helvetica Chimica Acta, 50(8), 2299–2321. http://doi.org/10.1002/hlca.19670500815 (Original work published 1967)
1973
- . (1973). DIE FLAVONOIDE VON MENTHA LONGIFOLIA . Planta Medica, 24(08). http://doi.org/10.1055/s-0028-1099503 (Original work published 12/1973AD)
1966
- . (1966). Die Glykoside der Samen von Stapelia gigantea N. E. Br. Glykoside und Aglykone, 275. Mitteilung. Helvetica Chimica Acta, 49(5). http://doi.org/10.1002/hlca.19660490512 (Original work published 1966)
2007
- . (2007). Dietary supplementation with Aloe ferox extracts reverses obesity in rats. South African Journal Of Botany, 73(2). http://doi.org/10.1016/j.sajb.2007.02.183 (Original work published 4/2007AD)
- . (2007). Differential accumulation of hyperforin and secohyperforin in Hypericum perforatum tissue cultures. Phytochemistry, 68(21). http://doi.org/10.1016/j.phytochem.2007.06.004 (Original work published 11/2007AD)
1994
- . (1994). Differences in flavonoid patterns between genera within the velloziaceae. Phytochemistry, 36(4). http://doi.org/10.1016/S0031-9422(00)90466-7 (Original work published 7/1994AD)
2014
- . (2014). Differential cellular interaction of Sutherlandia frutescens extracts on tumorigenic and non-tumorigenic breast cells. South African Journal Of Botany, 90. http://doi.org/10.1016/j.sajb.2013.10.008 (Original work published 01/2014AD)
2008
- . (2008). Difficulties encountered during the micropropagation of Boophone disticha (L.f.) Herb (Amaryllidaceae). South African Journal Of Botany, 74(2). http://doi.org/10.1016/j.sajb.2008.01.039 (Original work published 4/2008AD)
- . (2008). Direct NMR analysis of cannabis water extracts and tinctures and semi-quantitative data on Δ9-THC and Δ9-THC-acid. Phytochemistry, 69(2). http://doi.org/10.1016/j.phytochem.2007.07.018 (Original work published 1/2008AD)
2003
- . (2003). Discourses of Culture and Illness in South African Mental Health Care and Indigenous Healing, Part I: Western Psychiatric Power. Transcultural Psychiatry, 40(4), 542 - 561. http://doi.org/10.1177/1363461503404005 (Original work published 12/2003AD)