@article{SiwkaSchwinnBaczkoetal.1994,
  author    = {Wieslaw Siwka and Andreas Schwinn and Knut Baczko and Iancu Pardowitz and Fred Mhalu and John Shao and Axel Rethwilm and Volker ter Meulen},
  title     = {vpu and env sequence variability of HIV-1 isolates from Tanzania},
  year      = {1994},
}