@misc{indiciaec3f16828ff6d,
  title = {[Unresolved problems of poliomyelitis control].},
  author = {O Vivell},
  year = {1967},
  doi = {10.1055/s-0028-1105719},
  url = {https://pubmed.ncbi.nlm.nih.gov/6028134/},
  note = {Source identifier: 6028134}
}