Journal articles
1962
- . (1962). The cardiac glycosides of Acokanthera oblongifolia . Journal Of The South African Chemical Institute, 15, 82-84. Retrieved from http://reference.sabinet.co.za/webx/access/journal_archive/03794350/633.pdf (Original work published 1962)
2011
- . (2011). The cardioprotective effects of marrubiin, a diterpenoid found in Leonotis leonurus extracts. Journal Of Ethnopharmacology, 138(1). (Original work published 10/2011AD)
2008
- . (2008). The chemotaxonomic and medicinal significance of phenolic acids in Arctopus and Alepidea (Apiaceae subfamily Saniculoideae). Biochemical Systematics And Ecology, 36(9), 724 - 729. http://doi.org/10.1016/j.bse.2008.07.003 (Original work published 9/2008AD)
- . (2008). The Cultural Use of the Wild Olive Tree by the amaXhosa People in the Eastern Cape Province of South Africa. Journal For The Study Of Religion, Nature And Culture, 2(3). http://doi.org/10.1558/jsrnc.v2i3.292 (Original work published 01/2008AD)
2003
- . (2003). The chemotaxonomic significance of two bioactive caffeic acid esters, nepetoidins A and B, in the Lamiaceae. Phytochemistry, 64(2). http://doi.org/10.1016/S0031-9422(03)00192-4 (Original work published 9/2003AD)
2012
- . (2012). The chemotypic variation of Sceletium tortuosum alkaloids and commercial product formulations. Biochemical Systematics And Ecology, 44. http://doi.org/10.1016/j.bse.2012.06.025 (Original work published 10/2012AD)
2005
- . (2005). The commercial harvest of devil's claw (Harpagophytum spp.) in southern Africa: The devil's in the details. Journal Of Ethnopharmacology, 100(3). (Original work published 9/2005AD)
- . (2005). The composition, geographical variation and antimicrobial activity of Lippia javanica (Verbenaceae) leaf essential oils. Journal Of Ethnopharmacology, 96, 271–7. http://doi.org/10.1016/j.jep.2004.09.017
2014
- . (2014). The comparative study of antifungal activity of Syzygium aromaticum, Punica granatum and nystatin on Candida albicans; An in vitro study. Journal De Mycologie Médicale / Journal Of Medical Mycology, 24(4). http://doi.org/10.1016/j.mycmed.2014.07.001 (Original work published 12/2014AD)
2013
- . (2013). The complexity of medicinal plants: The traditional Artemisia annua formulation, current status and future perspectives. Journal Of Ethnopharmacology, 150(1). http://doi.org/10.1016/j.jep.2013.08.021 (Original work published 10/2013AD)
2002
- . (2002). The cytotoxic effects of a traditional Zulu remedy, impila (Callilepis laureola). Human And Experimental Toxicology, 21 (12), 643-647.
1976
- . (1976). The demonstration of galactosamine in a higher plant: Cannabis sativa. Phytochemistry, 15(2). http://doi.org/10.1016/S0031-9422(00)89015-9 (Original work published 1/1976AD)
2007
- . (2007). The design and evaluation of placebo material for crude herbals: Artemisia afra herb as a model. Phytotherapy Research, 21(5), 448–451. http://doi.org/10.1002/ptr.2084 (Original work published 05/2007AD)
1990
- . (1990). The Development of Artemisia afra (Jacq.) as a New Essential Oil Crop. Journal Of Essential Oil Research, 2(5), 215 - 220. http://doi.org/10.1080/10412905.1990.9697870 (Original work published 09/1990AD)
1922
- . (1922). The Distribution and Origin of Salix in South Africa. The Journal Of Ecology, 10(1). http://doi.org/10.2307/2255431 (Original work published 05/1922AD)