@misc{indiciae21a545afe7b9,
  title = {Pause relationships in multiple and chained fixed-ratio schedules.},
  author = {E K Crossman},
  year = {1968},
  doi = {10.1901/jeab.1968.11-117},
  url = {https://pubmed.ncbi.nlm.nih.gov/5645867/},
  note = {Source identifier: 5645867}
}