@misc{indiciae9f0ca5a4a599,
  title = {[ELECTROCARDIOGRAPHIC CHANGES DURING SURGERY IN OLD AGE].},
  author = {A ATANASOV and V MARINOV and D DIMOV},
  year = {1964},
  url = {https://pubmed.ncbi.nlm.nih.gov/14149063/},
  note = {Source identifier: 14149063}
}