@misc{indiciae846b9f311a9c,
  title = {Cardiac valve replacement. Problems solved and unsolved.},
  author = {H G Borst and N Papagiannakis and C Bedderman and H Oelert},
  year = {1979},
  doi = {10.1055/s-0028-1096223},
  url = {https://pubmed.ncbi.nlm.nih.gov/451983/},
  note = {Source identifier: 451983}
}