@misc{indiciaefda946cce987,
  title = {[Surgery on the mitral valve].},
  author = {Iu A Nesterenko and A A Dubrovskiĭ},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4776980/},
  note = {Source identifier: 4776980}
}