@misc{indiciae33b01fd2e8d5,
  title = {Behavioral contrast in chained schedules.},
  author = {R N Wilton and R A Gay},
  year = {1969},
  doi = {10.1901/jeab.1969.12-905},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811418/},
  note = {Source identifier: 16811418}
}