@misc{indiciae660a8d9bc008,
  title = {Visual efficiency and fatigue during the afternoon shift.},
  author = {J Krivohlavy},
  year = {1969},
  doi = {10.1080/00140136908931090},
  url = {https://pubmed.ncbi.nlm.nih.gov/5361451/},
  note = {Source identifier: 5361451}
}