@misc{indiciae7f36f39e49b7,
  title = {Visual discrimination in sharks without optic tectum.},
  author = {R C Graeber and S O Ebbesson and J A Jane},
  year = {1973},
  doi = {10.1126/science.180.4084.413},
  url = {https://pubmed.ncbi.nlm.nih.gov/4700600/},
  note = {Source identifier: 4700600}
}