@misc{indiciae18dd883e1060,
  title = {Threshold values and the psychophysical function in brightness vision.},
  author = {G Ekman and U Gustafsson},
  year = {1968},
  doi = {10.1016/0042-6989(68)90047-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/5729915/},
  note = {Source identifier: 5729915}
}