@misc{indiciaef1fc24903ced,
  title = {Charting and scoring the optic disc.},
  author = {G P Halberg},
  year = {1969},
  doi = {10.1001/archopht.1969.00990020151001},
  url = {https://pubmed.ncbi.nlm.nih.gov/5796088/},
  note = {Source identifier: 5796088}
}