@misc{indiciae6781ed1783fc,
  title = {Dynamic shape.},
  author = {J J Koenderink and A J van Doorn},
  year = {1986},
  doi = {10.1007/bf00318204},
  url = {https://pubmed.ncbi.nlm.nih.gov/3697408/},
  note = {Source identifier: 3697408}
}