@misc{indiciaeb647c5e6815b,
  title = {Learning when reward is delayed: a marking hypothesis.},
  author = {D A Lieberman and D C McIntosh and G V Thomas},
  year = {1979},
  doi = {10.1037//0097-7403.5.3.224},
  url = {https://pubmed.ncbi.nlm.nih.gov/528888/},
  note = {Source identifier: 528888}
}