Hughes, A. L., Westover, K., da Silva, J., O'Connor, D. H., & Watkins, D. I. (2001). Simultaneous Positive and Purifying Selection on Overlapping Reading Frames of the tat and vpr Genes of Simian Immunodeficiency Virus. American Society for Microbiology.

Hughes, Austin L., Kristi Westover, Jack da Silva, David H. O'Connor, und David I. Watkins. Simultaneous Positive and Purifying Selection On Overlapping Reading Frames of the Tat and Vpr Genes of Simian Immunodeficiency Virus. American Society for Microbiology, 2001.

Hughes, Austin L., et al. Simultaneous Positive and Purifying Selection On Overlapping Reading Frames of the Tat and Vpr Genes of Simian Immunodeficiency Virus. American Society for Microbiology, 2001.