@misc{indiciaea16dd1e2304d,
  title = {Effort tolerance before and after cardioversion.},
  author = {I W Obel and S Zwi and H I Goldman and M Bramwell-Jones},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5705425/},
  note = {Source identifier: 5705425}
}