@misc{indiciae9095e6017cac,
  title = {Slant-tilt: the visual encoding of surface orientation.},
  author = {K A Stevens},
  year = {1983},
  doi = {10.1007/bf00336800},
  url = {https://pubmed.ncbi.nlm.nih.gov/6850004/},
  note = {Source identifier: 6850004}
}