@misc{indiciae881569ce0fc0,
  title = {Fixed-interval performances with added stimuli in monkeys.},
  author = {C B FERSTER and J ZIMMERMAN},
  year = {1963},
  doi = {10.1901/jeab.1963.6-317},
  url = {https://pubmed.ncbi.nlm.nih.gov/13944949/},
  note = {Source identifier: 13944949}
}