@misc{indiciaebe62215b758c,
  title = {Intracardiac phonocardiography.},
  author = {A A Luisada},
  year = {1979},
  doi = {10.1161/01.cir.59.2.417},
  url = {https://pubmed.ncbi.nlm.nih.gov/759010/},
  note = {Source identifier: 759010}
}