Cherry, Michael (2000). «Letter fuels South Africa's AIDS furore». Nature404 (6781): 911. PMID10801091. doi:10.1038/35010218.
van der Merwe LJ, van Zyl GJ, St Clair Gibson A, Viljoen M, Iputo JE, Mammen M, Chitha W, Perez AM, Hartman N, Fonn S, Green-Thompson L, Ayo-Ysuf OA, Botha GC, Manning D, Botha SJ, Hift R, Retief P, van Heerden BB, Volmink J (16 de diciembre de 2015). «South African medical schools: Current state of selection criteria and medical students' demographic profile». South African Medical Journal106 (1): 76-81. PMID26792312. doi:10.7196/SAMJ.2016.v106i1.9913.
Cherry, Michael (2000). «Letter fuels South Africa's AIDS furore». Nature404 (6781): 911. PMID10801091. doi:10.1038/35010218.
van der Merwe LJ, van Zyl GJ, St Clair Gibson A, Viljoen M, Iputo JE, Mammen M, Chitha W, Perez AM, Hartman N, Fonn S, Green-Thompson L, Ayo-Ysuf OA, Botha GC, Manning D, Botha SJ, Hift R, Retief P, van Heerden BB, Volmink J (16 de diciembre de 2015). «South African medical schools: Current state of selection criteria and medical students' demographic profile». South African Medical Journal106 (1): 76-81. PMID26792312. doi:10.7196/SAMJ.2016.v106i1.9913.