@misc{indiciae21a4aa165a9d,
  title = {Age differences in autonomic variables during sleep.},
  author = {H Zepelin and C S McDonald},
  year = {1987},
  doi = {10.1093/geronj/42.2.142},
  url = {https://pubmed.ncbi.nlm.nih.gov/3819337/},
  note = {Source identifier: 3819337}
}