@misc{indiciae77c4232c7798,
  title = {[Sinus extrasystole].},
  author = {Z I Ianushkevichus and P V Zabela and D I Zhemaĭtite},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/65495/},
  note = {Source identifier: 65495}
}