@misc{indiciae206fd8cd0e3b,
  title = {Mental rotation in perspective problems.},
  author = {L C Boer},
  year = {1991},
  doi = {10.1016/0001-6918(91)90050-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/1862723/},
  note = {Source identifier: 1862723}
}