@misc{indiciaed7feca730fc6,
  title = {Conditioned reinforcement in chimpanzees.},
  author = {R T KELLEHER},
  year = {1957},
  doi = {10.1037/h0044327},
  url = {https://pubmed.ncbi.nlm.nih.gov/13502499/},
  note = {Source identifier: 13502499}
}