Schonfeldt, H.C. (Hettie Carina); Van Heerden, S.M.; Sainsbury, Jeanine; Gibson, Nicolette(South African Society for Animal Science / Copyright resides with the authors in terms of the Creative Commons Attribution 2.5 South African Licence., 2011)
Lukasiewicz, M.; Lozicki, A.; Casey, Norman Henry; Chwalibog, A.; Niemiec, J.; Matuszewski, A.; Sosnowska, M.; Wierzbicki, M.; Zielinska, M.; Balaban, J.; Sawosz, E.(South African Society for Animal Science, 2020-03-10)
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)