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Villinger, F., J D. Powell, T. Jehuda-Cohen, N. Neckelmann, M. Vuchetich, B. De, T M. Folks, H M. McClure, e A A. Ansari. Detection of Occult Simian Immunodeficiency Virus SIVsmm Infection in Asymptomatic Seronegative Nonhuman Primates and Evidence for Variation in SIV Gag Sequence between in Vivo- and in Vitro-propagated Virus. 1991.

Villinger, F., et al. Detection of Occult Simian Immunodeficiency Virus SIVsmm Infection in Asymptomatic Seronegative Nonhuman Primates and Evidence for Variation in SIV Gag Sequence between in Vivo- and in Vitro-propagated Virus. 1991.