@misc{indiciae8e25ee5ad095,
  title = {Testing the coplanar ratio hypothesis of lightness perception.},
  author = {Piers D L Howe},
  year = {2006},
  doi = {10.1068/p5461},
  url = {https://pubmed.ncbi.nlm.nih.gov/16619947/},
  note = {Source identifier: 16619947}
}