@misc{indiciae0c50c0789a2d,
  title = {Age changes in pupil size.},
  author = {J E BIRREN and R C CASPERSON and J BOTWINICK},
  year = {1950},
  doi = {10.1093/geronj/5.3.216},
  url = {https://pubmed.ncbi.nlm.nih.gov/15428618/},
  note = {Source identifier: 15428618}
}