Bronson, Ellen, Bush, R. Mitchell, Viner, Tabitha, Murray, Suzan, Wisely, Samantha M., and Deem, Sharon L. 2007. "
Mortality of Captive Black-footed Ferrets (Mustela nigripes) at Smithsonian National Zoological Park, 1989-2004."
Journal of Zoo and Wildlife Medicine. 38 (2):169–176.
https://doi.org/10.1638/1042-7260(2007)038[0169:MOCBFM]2.0.CO