Olivier, A.; Lane, E.; Volkmann, D.H.; Hofmeyr, M.; Stegmann, G.F., 2001. Rectal prolapse associated with a healed pelvic fracture in a pregnant free-ranging African black rhinoceros (Diceros bicornis), part 2: surgery and necropsy. Journal of the South African veterinary Association 72 (4): 242-244, figs. 1-3
Stegmann, G.F.; Hofmeyr, M.; Olivier, A.; Lane, E.; Volkmann, D.H., 2001. Rectal prolapse associated with a healed pelvic fracture in a pregnant free-ranging African black rhinoceros (Diceros bicornis), part 1: anaesthesia. Journal of the South African veterinary Association 72 (4): 239-241, table 1