@misc{indiciae580b07bfd400,
  title = {Natural and "induced" sleep.},
  author = {K Davison},
  year = {1969},
  doi = {10.1136/bmj.1.5646.781},
  url = {https://pubmed.ncbi.nlm.nih.gov/4306021/},
  note = {Source identifier: 4306021}
}