@misc{indiciaea0505e8e9350,
  title = {Hemodynamic changes during sleep.},
  author = {I M Khatri and E D Freis},
  year = {1967},
  doi = {10.1152/jappl.1967.22.5.867},
  url = {https://pubmed.ncbi.nlm.nih.gov/6026506/},
  note = {Source identifier: 6026506}
}