@misc{indiciaeee229d4e3107,
  title = {Nonstable concurrent choice in pigeons.},
  author = {G Schofield and M Davison},
  year = {1997},
  doi = {10.1901/jeab.1997.68-219},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812855/},
  note = {Source identifier: 16812855}
}