Journal articles
1999
- . (1999). The antibacterial activity of 27 southern African members of the Combretacea. South African Journal Of Science, 95, 148. Retrieved from http://search.ebscohost.com/login.aspx?direct=true&db=a9h&AN=1942525&site=ehost-live
2005
- . (2005). The antidiabetic activity of the herbal preparation ADD-199 in mice: a comparative study with two oral hypoglycaemic drugs. Journal Of Ethnopharmacology, 97(1). http://doi.org/10.1016/j.jep.2004.09.048 (Original work published 2/2005AD)
2007
- . (2007). The antifungal activity of twenty-four southern African Combretum species (Combretaceae). South African Journal Of Botany, 73(2), 173 - 183. http://doi.org/10.1016/j.sajb.2006.09.010 (Original work published 4/2007AD)
1997
- . (1997). The antimicrobial activity of 3,5,7-trihydroxyflavone isolated from the shoots of Helichrysum aureonitens. Journal Of Ethnopharmacology, 57(3), 177 - 181. http://doi.org/10.1016/S0378-8741(97)00065-2 (Original work published 8/1997AD)
2006
- . (2006). The antimicrobial, antimalarial and toxicity profiles of helihumulone, leaf essential oil and extracts of Helichrysum cymosum (L.) D. Don subsp. cymosum. South African Journal Of Botany, 72(2), 287 - 290. http://doi.org/10.1016/j.sajb.2005.07.007 (Original work published 5/2006AD)
2001
- . (2001). The antioxidant activity of the essential oils of Artemisia afra, Artemisia abyssinica and Juniperus procera. Phytotherapy Research, 15(2), 103 - 108. http://doi.org/10.1002/ptr.691 (Original work published 03/2001AD)
2004
- . (2004). The antioxidant potential of Sutherlandia frutescens. Journal Of Ethnopharmacology, 95(1), 1 - 5. http://doi.org/10.1016/j.jep.2004.05.024 (Original work published 11/2004AD)
2011
- . (2011). The apoptosis inducing effects of Sutherlandia spp. extracts on an oesophageal cancer cell line. Journal Of Ethnopharmacology, 137(3). http://doi.org/10.1016/j.jep.2011.07.054 (Original work published 10/2011AD)
- . (2011). The Boschberg (Somerset East, Eastern Cape) — A floristic cross-roads of the southern Great Escarpment. South African Journal Of Botany, 77(1). http://doi.org/10.1016/j.sajb.2010.06.005 (Original work published 1/2011AD)
- . (2011). The caper (Capparis L.): Ethnopharmacology, phytochemical and pharmacological properties. Fitoterapia, 82(2). http://doi.org/10.1016/j.fitote.2010.09.006 (Original work published 3/2011AD)
2000
- . (2000). The application of leaf phenolic evidence for systematic studies within the genus Pelargonium (Geraniaceae). Biochemical Systematics And Ecology, 28(2). http://doi.org/10.1016/S0305-1978(99)00044-7 (Original work published 3/2000AD)
2012
- . (2012). The Application of Phytomedicine in Modern Drug Development. The Internet Journal Of Herbal And Plant Medicine, 1(2). http://doi.org/10.5580/2c1f (Original work published 06/2012AD)
1982
- . (1982). The Baobab: Africa's Upside-Down Tree. Kew Bulletin, 37(2). http://doi.org/10.2307/4109961 (Original work published 1982)
2009
- . (2009). The bioactivity of novel furanoterpenoids isolated from Siphonochilus aethiopicus. Journal Of Ethnopharmacology, 121(1), 92 - 97. http://doi.org/10.1016/j.jep.2008.10.007 (Original work published 1/2009AD)
2008
- . (2008). The biological activity and chemistry of the southern African Combretaceae. Journal Of Ethnopharmacology, 119(3), 686 - 699. http://doi.org/10.1016/j.jep.2008.07.051 (Original work published 10/2008AD)