Rookmaaker, L.C.; Kraft, R. 2011. The history of the unique type of Rhinoceros cucullatus, with remarks on observations in Ethiopia by James Bruce and William Cornwallis Harris (Mammalia, Rhinocerotidae). Spixiana, Munchen 34 (1): 133-144, figs. 1-8.
Fisher, J.; Kraft, R. 1986. Stocking the modern Ark: animal acquisition at the National Zoo. ZooGoer Washington 15 (2) Mar-Apr: 20-22, back cover, 4 figs..






