@misc{indiciae43c4a99ae839,
  title = {Some observations on sinus arrhythmia [proceedings].},
  author = {J Cort and O G Edholm and T Lobstein and R Webb},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/874893/},
  note = {Source identifier: 874893}
}