@misc{indiciae62f5cf2f1e8f,
  title = {Threshold visibility of frequency gradient patterns.},
  author = {H R Wilson and S C Giese},
  year = {1977},
  doi = {10.1016/0042-6989(77)90152-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/595381/},
  note = {Source identifier: 595381}
}