@misc{indiciae4eb864e8ac4c,
  title = {Depth relief.},
  author = {J J Koenderink and A J van Doorn and A M Kappers},
  year = {1995},
  doi = {10.1068/p240115},
  url = {https://pubmed.ncbi.nlm.nih.gov/7617415/},
  note = {Source identifier: 7617415}
}