@misc{indiciae24513ebd3c85,
  title = {Probing depth in monocular images.},
  author = {K A Stevens and A Brookes},
  year = {1987},
  doi = {10.1007/bf00319515},
  url = {https://pubmed.ncbi.nlm.nih.gov/3620534/},
  note = {Source identifier: 3620534}
}