@misc{indiciae049d755293e8,
  title = {Increment thresholds across minimally distinct borders.},
  author = {F Ward and B W Tansley},
  year = {1974},
  doi = {10.1364/josa.64.000760},
  url = {https://pubmed.ncbi.nlm.nih.gov/4837667/},
  note = {Source identifier: 4837667}
}