@misc{indiciaea559ba4bd3d1,
  title = {CONTINUOUS OPPORTUNITY FOR REINFORCING BRAIN STIMULATION.},
  author = {E S VALENSTEIN and B BEER},
  year = {1964},
  doi = {10.1901/jeab.1964.7-183},
  url = {https://pubmed.ncbi.nlm.nih.gov/14130100/},
  note = {Source identifier: 14130100}
}