@misc{indiciae3887d9750b6f,
  title = {[Sick sinus node syndrome].},
  author = {E Malamov and I Tsenov and G Urumov and S Popnikolov and B Shakhov},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/735027/},
  note = {Source identifier: 735027}
}