Susan D. Crissey Crissey, S. D., Ange, K. D., Slifka, K. A., Sadler, W., Kahn, S., & Ward, A. M. (2004). Serum lipid concentrations in six canid and four ursid species in four zoos. JOURNAL OF ZOO AND WILDLIFE MEDICINE, 35(1), 34–39. https://doi.org/10.1638/00-091 Crissey, S. D., Ange, K. D., Jacobsen, K. L., Slifka, K. A., Bowen, P. E., Stacewicz-Sapuntzakis, M., … Ward, A. (2003). Serum concentrations of lipids, vitamin D metabolites, retinol, retinyl esters, tocopherols and selected carotenoids in twelve captive wild felid species at four zoos. JOURNAL OF NUTRITION, 133(1), 160–166. https://doi.org/10.1093/jn/133.1.160 Campbell, J. L., Eisemann, J. H., Glander, K. E., & Crissey, S. D. (1999). Intake, digestibility, and passage of a commercially designed diet by two Propithecus species. American Journal of Primatology, 48(3), 237–246. https://doi.org/10.1002/(SICI)1098-2345(1999)48:3<237::AID-AJP5>3.0.CO;2-V