@misc{indiciae7a8ff03be5fc,
  title = {Infant chimpanzees spontaneously perceive both concrete and abstract same/different relations.},
  author = {D L Oden and R K Thompson and D Premack},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2364739/},
  note = {Source identifier: 2364739}
}