@misc{indiciae669ad5d08d73,
  title = {Visual symmetry recognition by pigeons.},
  author = {J D Delius and B Nowak},
  year = {1982},
  doi = {10.1007/bf00308420},
  url = {https://pubmed.ncbi.nlm.nih.gov/7156265/},
  note = {Source identifier: 7156265}
}