@misc{indiciae8035fc9f793c,
  title = {Russian contribution to OPV.},
  author = {V I Agol and S G Drozdov},
  year = {1993},
  doi = {10.1006/biol.1993.1091},
  url = {https://pubmed.ncbi.nlm.nih.gov/8024746/},
  note = {Source identifier: 8024746}
}