@misc{indiciae8e61872df148,
  title = {Circadian variability in vigilance performance.},
  author = {T W Frazier and J A Rummel and H S Lipscomb},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5658342/},
  note = {Source identifier: 5658342}
}