@misc{indiciae0f96ba46ce81,
  title = {Limiting factors in threshold and suprathreshold vision.},
  author = {G A Hay and M S Chesters},
  year = {1970},
  doi = {10.1038/2281216a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5487256/},
  note = {Source identifier: 5487256}
}