@misc{indiciae35adc2639049,
  title = {On matrices in the study of pattern perception.},
  author = {T Shipley and M Popp},
  year = {1973},
  doi = {10.1016/0042-6989(73)90253-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4771217/},
  note = {Source identifier: 4771217}
}