@misc{indiciaed112079a6ee9,
  title = {Do monocular time-to-collision estimates necessarily involve perceived distance?},
  author = {R Gray and D Regan},
  year = {1999},
  doi = {10.1068/p2895},
  url = {https://pubmed.ncbi.nlm.nih.gov/10694973/},
  note = {Source identifier: 10694973}
}