@misc{indiciaed3852016ba85,
  title = {Spatial interaction in human cone vision.},
  author = {G Westheimer},
  year = {1967},
  doi = {10.1113/jphysiol.1967.sp008198},
  url = {https://pubmed.ncbi.nlm.nih.gov/6038016/},
  note = {Source identifier: 6038016}
}