@misc{indiciae051ce20ffa77,
  title = {Self-recruited feedback: a cost-effective procedure for maintaining behavior.},
  author = {D M Mank and R H Horner},
  year = {1987},
  doi = {10.1016/0891-4222(87)90042-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/3659444/},
  note = {Source identifier: 3659444}
}