@misc{indiciae05454ea2ee9f,
  title = {Two-colour threshold in static perimetry.},
  author = {E L Greve and W M Verduin and M Ledeboer},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4548123/},
  note = {Source identifier: 4548123}
}