@misc{indiciaec78ad60d3bfb,
  title = {A modified variable parameter cardiac pacer.},
  author = {N P Smyth and M Boivin and J M Bacos and J W Keller},
  year = {1970},
  doi = {10.1378/chest.57.3.275},
  url = {https://pubmed.ncbi.nlm.nih.gov/5415975/},
  note = {Source identifier: 5415975}
}