Journal articles
1976
- . (1976). The polyphenolics and flavonoids of Harpephyllum caffrum. Planta Medica, 29(02). http://doi.org/10.1055/s-0028-1097641 (Original work published 3/1976AD)
2010
- . (2010). The potential application of FT-Raman spectroscopy for the quantification and mapping of the steroidal glycoside P57 in Hoodia gordonii. Phytochemistry Letters, 3(3), 156 - 160. http://doi.org/10.1016/j.phytol.2010.06.003 (Original work published 9/2010AD)
2008
- . (2008). The potential of South African plants against Mycobacterium infections. Journal Of Ethnopharmacology, 119(3), 482 - 500. http://doi.org/10.1016/j.jep.2008.08.022 (Original work published 10/2008AD)
2011
- . (2011). The potential of South African plants in the development of new medicinal products. South African Journal Of Botany, 77(4), 812 - 829. http://doi.org/10.1016/j.sajb.2011.08.011 (Original work published 10/2011AD)
- . (2011). The Roggeveldberge — Notes on a botanically hot area on a cold corner of the southern Great Escarpment, South Africa. South African Journal Of Botany, 77(1), 112 - 126. http://doi.org/10.1016/j.sajb.2010.07.001 (Original work published 1/2011AD)
2013
- . (2013). The Potential of Sutherlandia frutescens for Herb-Drug Interaction. Drug Metabolism And Disposition, 41(2), 488 - 497. http://doi.org/10.1124/dmd.112.049593 (Original work published 02/2013AD)
- . (2013). The role of cytokinins on the antioxidant capacity and phenolic acid content during tissue culture and acclimatization of Merwilla plumbea. South African Journal Of Botany, 86. http://doi.org/10.1016/j.sajb.2013.02.126 (Original work published 5/2013AD)
1998
- . (1998). The preliminary isolation of several antibacterial compounds from Combretum erythrophyllum. Journal Of Ethnopharmacology, 62(3). (Original work published 10/1998AD)
1928
- . (1928). The present position of our knowledge of South African medicinal and poisonous plants. South African Journal Of Science, 25, 227-236. Retrieved from http://www.turner.ukzn.ac.za/iks/sites/default/files/J_M_Watt.pdf (Original work published 12/1928AD)
1987
- . (1987). The presumed neurotoxic effects of Catha edulis — an exotic plant now available in the United Kingdom. Journal Of Ethnopharmacology, 19(3). http://doi.org/10.1016/0378-8741(87)90012-2 (Original work published 5/1987AD)
2015
- . (2015). The psychostimulant drug khat (Catha edulis): A mini-review. Phytochemistry Letters, 13. http://doi.org/10.1016/j.phytol.2015.05.016 (Original work published 09/2015AD)
1994
- . (1994). The reduction of tropinone in Datura stramonium root cultures by two specific reductases. Phytochemistry, 37(2). http://doi.org/10.1016/0031-9422(94)85066-6 (Original work published 1/1994AD)
- . (1994). The role of culture in primary health care. Two case studies. South African Medical Journal, 84(12), 860-862. Retrieved from http://archive.samj.org.za/1994 VOL 84 Jan-Dec/Articles/12 December/1.13 THE ROLE OF CULTURE IN PRIMARY HEALTH CARE - TWO CASE STUDIES. V. Chipfakacha.pdf (Original work published 1994)
2003
- . (2003). The relationship of physico-chemical properties and structure to the differential antiplasmodial activity of the cinchona alkaloids. Malaria Journal, 2(1), 26. http://doi.org/10.1186/1475-2875-2-26
2006
- . (2006). The role of adrenal corticosteroids in the anti-inflammatory effect of the whole extract of Harpagophytum procumbens in rats. Phytomedicine, 13(6), 446 - 451. http://doi.org/10.1016/j.phymed.2005.06.004 (Original work published 6/2006AD)