@misc{indiciaed185ad5f7035,
  title = {Basic requirements for investigating systolic time intervals.},
  author = {D H Spodick},
  year = {1983},
  doi = {10.1016/0002-9149(83)90056-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6613899/},
  note = {Source identifier: 6613899}
}