@misc{indiciae8e6d989184b4,
  title = {Luminosity and Photometry.},
  author = {J B Haycraft},
  year = {1897},
  doi = {10.1113/jphysiol.1897.sp000647},
  url = {https://pubmed.ncbi.nlm.nih.gov/16992379/},
  note = {Source identifier: 16992379}
}