@misc{indiciae075e81ceb6d1,
  title = {Constancy and the geometric illusions.},
  author = {R L Gregory},
  year = {1965},
  doi = {10.1038/206745a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5833716/},
  note = {Source identifier: 5833716}
}