Petzer, Inge-Marie; Donkin, Edward Francis; Du Preez, E.; Karzis, Joanne; Van der Schans, Theodorus J.; Watermeyer, Johanna C.; Van Reenen, R.(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-06)
Stapelberg, F. Hein; Van Rooyen, Margaretha W.; Bothma, Jacobus du P.; Van der Linde, Michael J. (Mike); Groeneveld, Hendrik T.(South African National Parks, 2008)