@misc{indiciae71837c52bada,
  title = {Flight crew sleep during multiple layover polar flights.},
  author = {M Sasaki and Y S Kurosaki and C L Spinweber and R C Graeber and T Takahashi},
  year = {1993},
  url = {https://pubmed.ncbi.nlm.nih.gov/8357319/},
  note = {Source identifier: 8357319}
}