@misc{indiciae712c74f7c0d7,
  title = {Behavioral interactions in multiple variable-interval schedules.},
  author = {R D Spealman and L R Gollub},
  year = {1974},
  doi = {10.1901/jeab.1974.22-471},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811810/},
  note = {Source identifier: 16811810}
}