@misc{indiciae27acd5a8cd45,
  title = {Coarse-graining spectral analysis: new method for studying heart rate variability.},
  author = {Y Yamamoto and R L Hughson},
  year = {1991},
  doi = {10.1152/jappl.1991.71.3.1143},
  url = {https://pubmed.ncbi.nlm.nih.gov/1757311/},
  note = {Source identifier: 1757311}
}