@misc{indiciaede8466774ae6,
  title = {Intercurrent and reinforced behavior under multiple spaced-responding schedules.},
  author = {J B Smith and F C Clark},
  year = {1974},
  doi = {10.1901/jeab.1974.21-445},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811756/},
  note = {Source identifier: 16811756}
}