@misc{indiciaea09ccab4d6c2,
  title = {Equal-appearing interval scale values and successive interval scale values derived from the same set of ratings.},
  author = {F H Silverman and D Sherman},
  year = {1967},
  doi = {10.2466/pms.1967.25.1.226},
  url = {https://pubmed.ncbi.nlm.nih.gov/6077976/},
  note = {Source identifier: 6077976}
}