@misc{indiciaef07377bbe3f6,
  title = {Increment sensitivity in humans with abnormal visual experience.},
  author = {B L Beyerstein and R D Freeman},
  year = {1976},
  doi = {10.1113/jphysiol.1976.sp011528},
  url = {https://pubmed.ncbi.nlm.nih.gov/978567/},
  note = {Source identifier: 978567}
}