@misc{indiciaea10c18de5653,
  title = {[Study of umbilical cord coiling and variable deceleration].},
  author = {M Kitagawa},
  year = {1989},
  doi = {10.1272/jnms1923.56.22},
  url = {https://pubmed.ncbi.nlm.nih.gov/2732302/},
  note = {Source identifier: 2732302}
}