@misc{indiciae6a8279a8ba4a,
  title = {A perimetric learner's index.},
  author = {J Olsson and P Asman and A Heijl},
  year = {1997},
  doi = {10.1111/j.1600-0420.1997.tb00627.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9527328/},
  note = {Source identifier: 9527328}
}