@misc{indiciaeda03cdf98906,
  title = {Concept conservation under positively and negatively evaluated transformations.},
  author = {E Saltz and H Hamilton},
  year = {1968},
  doi = {10.1016/0022-0965(68)90070-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5642133/},
  note = {Source identifier: 5642133}
}