Gabriel, Sarah; Phiri, I.K.; Dorny, P.; Vercruysse, J.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
Van Amstel, S.R.; Myburgh, Elsbe; Mundell, Jennifer; Davidson, B.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
Swan, Gerry E.; Oliver, D.W.; Van Rensburg, J.; Steyn, H.S.; Mulders, M.S.G.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)