@misc{indiciaebde227af8e5a,
  title = {Internal phase-angle differences in human circadian rhythms: causes for changes and problems of determinations.},
  author = {R Wever},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4781026/},
  note = {Source identifier: 4781026}
}