![](http://www.rhinoresourcecenter.com/style_images/1/cat_arrow.gif) | Patton, M.L.; Swaisgood, R.R.; Czekala, N.M.; White, A.M.; Fetter, G.A.; Montagne, J.P.; Rieches, R.G.; Lance, V.A., 1999. Reproductive cycle length and pregnancy in the southern white rhinoceros (Ceratotherium simum simum) as determined by fecal pregnane analysis and observations of mating behavior. Zoo Biology 18 (2): 111-127, figs. 1-4, tables 1-2
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