@misc{indiciaeb079428b0bc0,
  title = {Variations in delta sleep.},
  author = {A Kales and A Jacobson and J D Kales and E J Kollar and G Heuser and G Beall},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/4174049/},
  note = {Source identifier: 4174049}
}