@misc{indiciaef1841ad7b79e,
  title = {Measuring heart rate variability: some comments on the successive difference mean square statistic.},
  author = {D G Wastell},
  year = {1981},
  doi = {10.1111/j.1469-8986.1981.tb01550.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7465734/},
  note = {Source identifier: 7465734}
}