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)
Fasina, Folorunso Oludayo; Sirdar, Mohamed Mahmoud; Bisschop, S.P.R. (Shahn)(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-01)