@misc{indiciae2166ebe05fae,
  title = {Real and imagined cost effects upon human fixed-interval responding.},
  author = {H Weiner},
  year = {1965},
  doi = {10.2466/pr0.1965.17.2.659},
  url = {https://pubmed.ncbi.nlm.nih.gov/5833752/},
  note = {Source identifier: 5833752}
}