@misc{indiciaeac3ceb4de7d3,
  title = {Shutter for vision experiments.},
  author = {H E GUTTMANN},
  year = {1963},
  doi = {10.1364/josa.53.000642},
  url = {https://pubmed.ncbi.nlm.nih.gov/13951485/},
  note = {Source identifier: 13951485}
}