@misc{indiciae162030cf59c3,
  title = {Visual-geometric illusions: unisex phenomena.},
  author = {C Porac and S Coren and J S Girgus and M Verde},
  year = {1979},
  doi = {10.1068/p080401},
  url = {https://pubmed.ncbi.nlm.nih.gov/503771/},
  note = {Source identifier: 503771}
}