@misc{indiciaebcfe60e39130,
  title = {Mitral valve replacement using aortic heterografts.},
  author = {D W Schwartz and D S Thearle and D G Mulder},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/4885449/},
  note = {Source identifier: 4885449}
}