Van der Westhuizen, L.; Magwaba, T.; Grobler, J.P; Bindeman, H.; Du Plessis, C.; Van Marle-Koster, Este; Neser, F.W.C.(South African Society for Animal Science, 2019-04-11)
Grant, Rina C.C.; Botha, Judith; Grant, T.C. (Thelani); Peel, Michael J.; Smit, Izak P.J.(NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2019)