@misc{indiciaed67ddfd1e3df,
  title = {The invariance hypothesis and the intuitive perceiver: a developmental study.},
  author = {D W Kaess},
  year = {1973},
  doi = {10.1068/p020003},
  url = {https://pubmed.ncbi.nlm.nih.gov/4777568/},
  note = {Source identifier: 4777568}
}