Worobey, M., Gemmel, M., Teuwen, D. E., Haselkorn, T., Kunstman, K., Bunce, M., Muyembe, J.-J., Kabongo, J.-M. M., Kalengayi, R. M., Van Marck, E., Gilbert, M. T. P., & Wolinsky, S. M. (2008). Direct evidence of extensive diversity of HIV-1 in Kinshasa by 1960. *Nature*, *455*, 661–664. https://doi.org/ch5ggj