@misc{indiciaeb539c1ad32ed,
  title = {Using metamers to explore motion perception.},
  author = {D Williams and S Tweten and R Sekuler},
  year = {1991},
  doi = {10.1016/0042-6989(91)90118-o},
  url = {https://pubmed.ncbi.nlm.nih.gov/2017888/},
  note = {Source identifier: 2017888}
}