Ngeranwa, J.J.N.; Shompole, S.P.; Venter, Estelle Hildegard; Wambugu, A.; Crafford, Jan Ernst; Penzhorn, Barend Louis(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-09)
Van Dyk, Enette; Bosman, Anna-Mari; Van Wilpe, Erna; Williams, June Heather; Bengis, Roy G.; Van Heerden, J.; Venter, Estelle Hildegard(South African Veterinary Association, 2011-04)