@misc{indiciae91da03e4ef31,
  title = {Changes in sleep cycle patterns with age.},
  author = {I Feinberg},
  year = {1974},
  doi = {10.1016/0022-3956(74)90011-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4376564/},
  note = {Source identifier: 4376564}
}