@misc{indiciaea8cca1d5181b,
  title = {Lever attacking by rats during free-operant avoidance.},
  author = {J J Pear and J E Moody and M A Persinger},
  year = {1972},
  doi = {10.1901/jeab.1972.18-517},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811641/},
  note = {Source identifier: 16811641}
}