@misc{indiciaec0c5ef2afa34,
  title = {Projective invariance and visual shape constancy.},
  author = {K K Niall and J MacNamara},
  year = {1989},
  doi = {10.1016/0001-6918(89)90051-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/2801171/},
  note = {Source identifier: 2801171}
}