@misc{indiciae53a960a89cf2,
  title = {Human binocular summation at absolute threshold.},
  author = {F Thorn and R M Boynton},
  year = {1974},
  doi = {10.1016/0042-6989(74)90033-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4422216/},
  note = {Source identifier: 4422216}
}