@misc{indiciae10e65bda0898,
  title = {A category theory approach to cognitive development.},
  author = {G S Halford and W H Wilson},
  year = {1980},
  doi = {10.1016/0010-0285(80)90014-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/7408434/},
  note = {Source identifier: 7408434}
}