@misc{indiciaef80c7860d8ef,
  title = {Negative reinforcement with shock-frequency increase.},
  author = {E T Gardner and P Lewis},
  year = {1976},
  doi = {10.1901/jeab.1976.25-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811893/},
  note = {Source identifier: 16811893}
}