@misc{indiciaed5869a7d40f0,
  title = {[Assessment of sinus node function using electrophysiological methods].},
  author = {I Tsenov and G Urumov and Iu Belov},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7303643/},
  note = {Source identifier: 7303643}
}