@misc{indiciae554a98f2a718,
  title = {Contrast discrimination: invariant to spatial parameters.},
  author = {L M Määttänen and J J Koenderink and B Nienhuis},
  year = {1988},
  doi = {10.1016/0042-6989(88)90028-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/3227658/},
  note = {Source identifier: 3227658}
}