@misc{indiciaeafba61ef483b,
  title = {Pigeons flexibly time or count on cue.},
  author = {W A Roberts and R Coughlin and S Roberts},
  year = {2000},
  doi = {10.1111/1467-9280.00244},
  url = {https://pubmed.ncbi.nlm.nih.gov/11273406/},
  note = {Source identifier: 11273406}
}