@misc{indiciae60f06a1ec927,
  title = {Choice and conditioned reinforcement.},
  author = {E Fantino and D Freed and R A Preston and W A Williams},
  year = {1991},
  doi = {10.1901/jeab.1991.55-177},
  url = {https://pubmed.ncbi.nlm.nih.gov/2037826/},
  note = {Source identifier: 2037826}
}