@misc{indiciae1de4b9090ce6,
  title = {[Fetal electrocardiography].},
  author = {M Lindgren and I A Sulg and T Wahlén},
  year = {1967},
  url = {https://pubmed.ncbi.nlm.nih.gov/6069028/},
  note = {Source identifier: 6069028}
}