Authors: Mellen, J MacPhee, MS

Citation: J. Mellen et Ms. Macphee, Philosophy of environmental enrichment: past, present, and future, ZOO BIOL, 20(3), 2001, pp. 211-226

Authors: Carlstead, K Mellen, J Kleiman, DG

Citation: K. Carlstead et al., Black rhinoceros (Diceros bicornis) in US zoos: I. Individual behavior profiles and their relationship to breeding success, ZOO BIOL, 18(1), 1999, pp. 17-34