@misc{indiciae75e851c94d87,
  title = {Light source dependence in shape from shading.},
  author = {C G Christou and J J Koenderink},
  year = {1997},
  doi = {10.1016/s0042-6989(96)00282-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/9205707/},
  note = {Source identifier: 9205707}
}