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Hooper, J. W., E. Thompson, C. Wilhelmsen, M. Zimmerman, M. Ait Ichou, S. E. Steffen, C. S. Schmaljohn, A. L. Schmaljohn, und P. B. Jahrling. Smallpox DNA Vaccine Protects Nonhuman Primates against Lethal Monkeypox. American Society for Microbiology, 2004.

Hooper, J. W., et al. Smallpox DNA Vaccine Protects Nonhuman Primates against Lethal Monkeypox. American Society for Microbiology, 2004.