@misc{indiciae6bfde75b72c1,
  title = {A continuously recording retinal densitometer.},
  author = {D van Norren and J van der Kraats},
  year = {1981},
  doi = {10.1016/0042-6989(81)90191-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/7314468/},
  note = {Source identifier: 7314468}
}