@misc{indiciae6bd20d1988f1,
  title = {Feedback functions for variable-interval reinforcement.},
  author = {J A Nevin and W M Baum},
  year = {1980},
  doi = {10.1901/jeab.1980.34-207},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812187/},
  note = {Source identifier: 16812187}
}