@misc{indiciaed186ef8c9582,
  title = {Apparent surface curvature affects lightness perception.},
  author = {D C Knill and D Kersten},
  year = {1991},
  doi = {10.1038/351228a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2041568/},
  note = {Source identifier: 2041568}
}