Delsink, Audrey K.; Kirkpatrick, Jay F.; Van Altena, J.J.; Bertschinger, Hendrik Jan; Ferreira, Sam M.; Slotow, Robert(American Association of Zoo Veterinarians, 2013-12)
Viljoen, Jozua Jakobus; Ganswindt, Andre; Palme, Rupert; Reynecke, Hendrik C.; Du Toit, Johan T.; Langbauer, William Richard(South African National Parks, 2008)