@misc{indiciaef118a88a136d,
  title = {Application of minnesota ECG classification code system amplified by some quantitative code signs, in diagnostics of acquired vitium cordis and early phase of ischemic heart disease.},
  author = {S A Ivanova},
  year = {1977},
  doi = {10.1159/000399680},
  url = {https://pubmed.ncbi.nlm.nih.gov/835423/},
  note = {Source identifier: 835423}
}