@misc{indiciaefac286144708,
  title = {Excimer laser keratoplasty. Part 1: Basic concepts.},
  author = {G K Lang and E Schroeder and J W Koch and M Yanoff and G O Naumann},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2660051/},
  note = {Source identifier: 2660051}
}