@misc{indiciae31a290c5d657,
  title = {Visual illusions.},
  author = {R L Gregory},
  year = {1968},
  doi = {10.1038/scientificamerican1168-66},
  url = {https://pubmed.ncbi.nlm.nih.gov/5680232/},
  note = {Source identifier: 5680232}
}