@misc{indiciaef9510531d49a,
  title = {STEREOSCOPIC SHADOW-IMAGES.},
  author = {R L GREGORY},
  year = {1964},
  doi = {10.1038/2031407b0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14208302/},
  note = {Source identifier: 14208302}
}