@misc{indiciaebd8d53be5afa,
  title = {Pulsus alternans - Physiologic study by noninvasive techniques},
  author = {Spodick, D. H. and St. Pierre, J. R.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710032795},
  note = {Source identifier: 19710032795}
}