@misc{indiciae406b7950f0c1,
  title = {Unlearning in two directions.},
  author = {I M Birnbaum},
  year = {1966},
  doi = {10.1037/h0023336},
  url = {https://pubmed.ncbi.nlm.nih.gov/5967733/},
  note = {Source identifier: 5967733}
}