@misc{indiciaeafb0d7159e2d,
  title = {Edge detectors in human vision.},
  author = {R M Shapley and D J Tolhurst},
  year = {1973},
  doi = {10.1113/jphysiol.1973.sp010133},
  url = {https://pubmed.ncbi.nlm.nih.gov/4689964/},
  note = {Source identifier: 4689964}
}