@misc{indiciaeb9ac27cbd0b4,
  title = {Within-session changes in key and lever pressing for water during several multiple variable-interval schedules.},
  author = {F K McSweeney and J N Weatherly and S Swindell},
  year = {1995},
  doi = {10.1901/jeab.1995.64-75},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812763/},
  note = {Source identifier: 16812763}
}