@misc{indiciae1c0be3a73658,
  title = {Constancy and the geometric illusions.},
  author = {N K Humphrey and M J Morgan},
  year = {1965},
  doi = {10.1038/206744b0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5833715/},
  note = {Source identifier: 5833715}
}