@misc{indiciae9576e7f26299,
  title = {The reflex optical plotter. A preliminary report.},
  author = {G W Butcher and C D Stephens},
  year = {1981},
  doi = {10.1038/sj.bdj.4804688},
  url = {https://pubmed.ncbi.nlm.nih.gov/6945116/},
  note = {Source identifier: 6945116}
}