@misc{indiciaed04835ed4c04,
  title = {[Indications for cervical cerclage].},
  author = {O Kauppila and P Pystynen and P Vaalamo},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4838441/},
  note = {Source identifier: 4838441}
}