@misc{indiciae9d7808dc40ae,
  title = {Spontaneous variability in arrhythmia frequency.},
  author = {E L Michelson and J Morganroth},
  year = {1979},
  doi = {10.1016/0002-8703(79)90023-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/433760/},
  note = {Source identifier: 433760}
}