@misc{indiciaef8bd13ac02e8,
  title = {The first derivative thoracic impedance cardiogram.},
  author = {Z Lababidi and D A Ehmke and R E Durnin and P E Leaverton and R M Lauer},
  year = {1970},
  doi = {10.1161/01.cir.41.4.651},
  url = {https://pubmed.ncbi.nlm.nih.gov/5437409/},
  note = {Source identifier: 5437409}
}