Munson, L.; Koehler, J.W.; Wilkinson, J.E.; Miller, R.E. 1998. Vesicular and ulcerative dermatopathy resembling superficial necrolytic dermatitis in captive black rhinoceroses (Diceros bicornis).
Veterinary Pathology 35: 31-42, figs. 1-12, tables 1-3.