@misc{indiciae6009a33c122b,
  title = {Sleep onset facilitation by tones.},
  author = {W B Webb and H W Agnew},
  year = {1979},
  doi = {10.1093/sleep/1.3.281},
  url = {https://pubmed.ncbi.nlm.nih.gov/504873/},
  note = {Source identifier: 504873}
}