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Xi, Long Fu, James P. Hughes, Philip E. Castle, Zoe R. Edelstein, Chunhui Wang, Denise A. Galloway, Laura A. Koutsky, Nancy B. Kiviat, and Mark Schiffman. Viral Load in the Natural History of Human Papillomavirus Type 16 Infection: A Nested Case–control Study. Oxford University Press, 2011.

Xi, Long Fu, et al. Viral Load in the Natural History of Human Papillomavirus Type 16 Infection: A Nested Case–control Study. Oxford University Press, 2011.