@misc{indiciae9c4cee5e8045,
  title = {A perspective metric for visual slant and shape.},
  author = {R B Freeman},
  year = {1969},
  doi = {10.1007/bf00424713},
  url = {https://pubmed.ncbi.nlm.nih.gov/5794660/},
  note = {Source identifier: 5794660}
}