Maree, J.G. (Kobus); Gerryts, Erna W.; Fletcher, Lizelle; Olivier, Joyce(NISC (Pty) Ltd and Informa UK Limited (trading as Taylor and Francis Group), 2019)
Maree, J.G. (Kobus); Hislop-Esterhuysen, Natalie; Swanepoel, Andre; Van der Linde, Michael J. (Mike)(Suid Afrikaanse Akademie vir Wetenskap & Kuns, 2008-03)