@misc{indiciae6767c4d7c107,
  title = {Threshold and suprathreshold perceptual color differences.},
  author = {R F Witzel and R W Burnham and J W Onley},
  year = {1973},
  doi = {10.1364/josa.63.000615},
  url = {https://pubmed.ncbi.nlm.nih.gov/4731340/},
  note = {Source identifier: 4731340}
}