@misc{indiciaef4084553c962,
  title = {Acquisition and extinction as a function of incentive shift.},
  author = {M H Marx},
  year = {1971},
  doi = {10.2466/pr0.1971.29.2.467},
  url = {https://pubmed.ncbi.nlm.nih.gov/5126753/},
  note = {Source identifier: 5126753}
}