Clauss, M.; Castell, J.C.; Kienzle, E.; Dierenfeld, E.S.; Flach, E.J.; Behlert, O.; Ortmann, S.; Streich, W.J.; Hummel, J.; Hatt, J.M. 2006. Digestion coefficients achieved by the black rhinoceros (Diceros bicornis), a large browsing hindgut fermenter. Journal of Animal Physiology and Animal Nutrition 90: 325-334, figs. 1-3, tables 1-6.