@misc{indiciaea5ee7c329dc7,
  title = {Artificial intelligence: recognizing three dimensions.},
  author = {H C Longuet-Higgins},
  year = {1990},
  doi = {10.1038/343214a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2300164/},
  note = {Source identifier: 2300164}
}