@misc{indiciae9ff6158b141e,
  title = {Pappus in optical space.},
  author = {Jan J Koenderink and Andrea J van Doorn and Astrid M L Kappers and James T Todd},
  year = {2002},
  doi = {10.3758/bf03194711},
  url = {https://pubmed.ncbi.nlm.nih.gov/12049279/},
  note = {Source identifier: 12049279}
}