@misc{indiciae16253dbd1b1d,
  title = {[Smallpox in Europe].},
  author = {S T Madsen and C Lerche and J Kvittingen},
  year = {1967},
  url = {https://pubmed.ncbi.nlm.nih.gov/4872923/},
  note = {Source identifier: 4872923}
}