@misc{indiciae8d4b82303e07,
  title = {Umbilical circulation--physiology and pathology.},
  author = {W Künzel},
  year = {1981},
  doi = {10.1515/jpme.1981.9.s1.68},
  url = {https://pubmed.ncbi.nlm.nih.gov/7229894/},
  note = {Source identifier: 7229894}
}