@misc{indiciae7a9c05f700d5,
  title = {Copolyether-urethanes as materials for artificial hearts.},
  author = {T Kolff and G Burkett and J Feyen},
  year = {1973},
  doi = {10.3109/10731197309118569},
  url = {https://pubmed.ncbi.nlm.nih.gov/4792492/},
  note = {Source identifier: 4792492}
}