Ellis, S., Janssen, D. L., Edwards, M., Howard, JoGayle, He, G., Yu, J., Zhang, G., Wei, R., Miller, R. E., and Wildt, David E. 2006. "Factors limiting reproductive success in the giant panda as revealed by a biomedical survey." In Giant Pandas: Biology, Veterinary Medicine and Management. Wildt, David E., Zhang, A., Zhang, H., Janssen, D. L., and Ellis, S., editors. 37–58. Cambridge: Cambridge University Press.