@misc{indiciae8d81e35d66ca,
  title = {[Experience with mitral valve prostheses].},
  author = {E Grädel and F Burkart and R von Bertrab and G Wolff},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5682106/},
  note = {Source identifier: 5682106}
}