@misc{indiciae3ed6073ad35c,
  title = {Relationship between response rate and reinforcement frequency in variable-interval schedules: III. The effect of d-amphetamine.},
  author = {C M Bradshaw and H V Ruddle and E Szabadi},
  year = {1981},
  doi = {10.1901/jeab.1981.36-29},
  url = {https://pubmed.ncbi.nlm.nih.gov/7241036/},
  note = {Source identifier: 7241036}
}