@misc{indiciaea89a6c3ee137,
  title = {Annual biological clocks.},
  author = {E T Pengelley and S J Asmundson},
  year = {1971},
  doi = {10.1038/scientificamerican0471-72},
  url = {https://pubmed.ncbi.nlm.nih.gov/5545632/},
  note = {Source identifier: 5545632}
}