@misc{indiciaefd8d3865182c,
  title = {Observations on spatial-frequency doubling.},
  author = {C W Tyler},
  year = {1974},
  doi = {10.1068/p030081},
  url = {https://pubmed.ncbi.nlm.nih.gov/4444923/},
  note = {Source identifier: 4444923}
}