@misc{indiciaeaa7378d4ca0a,
  title = {Maintenance of avoidance behavior by unavoidable shocks.},
  author = {M SIDMAN and R J HERRNSTEIN and D G CONRAD},
  year = {1957},
  doi = {10.1037/h0043500},
  url = {https://pubmed.ncbi.nlm.nih.gov/13502495/},
  note = {Source identifier: 13502495}
}