@misc{indiciae18a2b4e3757b,
  title = {Circadian performance rhythms: some practical and theoretical implications.},
  author = {S Folkard},
  year = {1990},
  doi = {10.1098/rstb.1990.0097},
  url = {https://pubmed.ncbi.nlm.nih.gov/1970900/},
  note = {Source identifier: 1970900}
}