@misc{indiciaef920c6b5481b,
  title = {Facts on optic flow.},
  author = {J J Koenderink and A J van Doorn},
  year = {1987},
  doi = {10.1007/bf00365219},
  url = {https://pubmed.ncbi.nlm.nih.gov/3607100/},
  note = {Source identifier: 3607100}
}