@misc{indiciae369de756a7bf,
  title = {[A stereoscopic operation microscope for vitreoretinal surgery].},
  author = {W Lotmar and F Fankhauser},
  year = {1969},
  doi = {10.1007/bf00431627},
  url = {https://pubmed.ncbi.nlm.nih.gov/5305736/},
  note = {Source identifier: 5305736}
}