@misc{indiciae5d431b2e2f2a,
  title = {Ruby laser transmission and the lens.},
  author = {A R Elkington and G K Watts},
  year = {1970},
  doi = {10.1136/bjo.54.6.423},
  url = {https://pubmed.ncbi.nlm.nih.gov/5448133/},
  note = {Source identifier: 5448133}
}