Castley, J., and A. Hall-Martin. “The Status of the Southern White Rhinoceros (Ceratotherium Simum Simum) on Private Land in South Africa in 2001”. Pachyderm, vol. 34, no. 1, June 2003, pp. 33-44, https://pachydermjournal.org/index.php/pachyderm/article/view/1131.