@misc{indiciaec66e51da6dde,
  title = {Gaussian bars and rectangular bars: the influence of width and gradient on visibility.},
  author = {R Shapley},
  year = {1974},
  doi = {10.1016/0042-6989(74)90021-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4446376/},
  note = {Source identifier: 4446376}
}