@misc{indiciaedf2e66901cd9,
  title = {Delayed reinforcement in a multiple schedule.},
  author = {D M Wilkie},
  year = {1971},
  doi = {10.1901/jeab.1971.16-233},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811544/},
  note = {Source identifier: 16811544}
}