@misc{indiciae3b0fa0974797,
  title = {Human performance on conjunctive fixed-interval fixed-ratio schedules.},
  author = {J D Duvinsky and R Poppen},
  year = {1982},
  doi = {10.1901/jeab.1982.37-243},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812267/},
  note = {Source identifier: 16812267}
}