@misc{indiciaeecf25157dcb5,
  title = {Alternative reinforcement effects on fixed-interval performance.},
  author = {K A Lattal and S S Boyer},
  year = {1980},
  doi = {10.1901/jeab.1980.34-285},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812190/},
  note = {Source identifier: 16812190}
}