@misc{indiciae6be1148a2a6f,
  title = {[Cardiotocography].},
  author = {W Michalkiewicz and Z Slomko and R Biczysko},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4557335/},
  note = {Source identifier: 4557335}
}