@misc{indiciae5848b41b7f96,
  title = {Aortic and mitral valve replacement with two different disc prostheses. A randomized and comparative study.},
  author = {L Efskind and S Nitter-Hauge and K V Hall and T Froysaker and O Storstein},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4806879/},
  note = {Source identifier: 4806879}
}