@misc{indiciaee26dcb2260a4,
  title = {Increment thresholds on black bars.},
  author = {D Y Teller},
  year = {1968},
  doi = {10.1016/0042-6989(68)90045-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5729914/},
  note = {Source identifier: 5729914}
}