@misc{indiciae4df0d7172007,
  title = {Integral arc illumination for projection perimeters.},
  author = {L Frisén},
  year = {1969},
  doi = {10.1111/j.1755-3768.1969.tb02517.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5395861/},
  note = {Source identifier: 5395861}
}