@misc{indiciae508d9476b5d0,
  title = {Letter: Sustained visual afterimages.},
  author = {S Magnussen and T Torjussen},
  year = {1974},
  doi = {10.1016/0042-6989(74)90074-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4420081/},
  note = {Source identifier: 4420081}
}