@misc{indiciaec10b3880dd3f,
  title = {Selection forces and constraints on retroviral sequence variation.},
  author = {J Overbaugh and C R Bangham},
  year = {2001},
  doi = {10.1126/science.1059128},
  url = {https://pubmed.ncbi.nlm.nih.gov/11352065/},
  note = {Source identifier: 11352065}
}