@misc{indiciae900bb3c2a06d,
  title = {Problem diversity and familiarity in multiple discrimination learning by monkeys.},
  author = {A J Riopelle and W H Moon},
  year = {1968},
  doi = {10.1016/0003-3472(68)90113-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4966468/},
  note = {Source identifier: 4966468}
}