@misc{indiciae6a68031face7,
  title = {Myocardial efficiency.},
  author = {R J BING and G MICHAL},
  year = {1959},
  doi = {10.1111/j.1749-6632.1959.tb44182.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/13627939/},
  note = {Source identifier: 13627939}
}