@misc{indiciae23efbf4c82aa,
  title = {ACQUISITION AND EXTINCTION AFTER INITIAL TRIALS WITHOUT REWARD.},
  author = {N E SPEAR and W F HILL and D J O'SULLIVAN},
  year = {1965},
  doi = {10.1037/h0021628},
  url = {https://pubmed.ncbi.nlm.nih.gov/14256243/},
  note = {Source identifier: 14256243}
}