@misc{indiciae25679150fca5,
  title = {Spatial and luminance factors determining visual excitability.},
  author = {T E Frumkes and J F Sturr},
  year = {1968},
  doi = {10.1364/josa.58.001657},
  url = {https://pubmed.ncbi.nlm.nih.gov/5700431/},
  note = {Source identifier: 5700431}
}