@misc{indiciae5b80c7e41a4e,
  title = {Visual testing with 'preferential looking' in mentally retarded children.},
  author = {G Lennerstrand and A Axelsson and G Andersson},
  year = {1983},
  doi = {10.1016/0166-4328(83)90165-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/6639726/},
  note = {Source identifier: 6639726}
}