@misc{indiciae9a1feba0582f,
  title = {Fetal heart rhythms during behavioural state 1F.},
  author = {E E van Woerden and H P van Geijn and J M Swartjes and F J Caron and J T Brons and N F Arts},
  year = {1988},
  doi = {10.1016/0028-2243(88)90057-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/3391332/},
  note = {Source identifier: 3391332}
}