Carlstead, K., Fraser, J., Bennett, C., Kleiman, K. (1999). Black rhinoceros (Diceros bicornis) in US zoos: behavior, breeding success and mortality in relation to housing facilities. Zoo Biology. 18 35-52
Carlstead, K., Fraser, J., Bennett, C., Kleiman, K. (1999). Black rhinoceros (Diceros bicornis) in US zoos: behavior, breeding success and mortality in relation to housing facilities. Zoo Biology. 18 35-52