@misc{indiciaec6de9db3e781,
  title = {Measured spatial accuracy for linac-based radiosurgery.},
  author = {P F O'Brien and A Fung},
  year = {1994},
  doi = {10.1118/1.597341},
  url = {https://pubmed.ncbi.nlm.nih.gov/7968847/},
  note = {Source identifier: 7968847}
}