@misc{indiciaed85c4059da6c,
  title = {Evaluation of left ventricular function by echo-apex tracings.},
  author = {S Khoór and E Kékes and F Szabóki and E Berentey},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2339583/},
  note = {Source identifier: 2339583}
}