@misc{indiciae5908270240bd,
  title = {In search of the feedback function for variable-interval schedules.},
  author = {W M Baum},
  year = {1992},
  doi = {10.1901/jeab.1992.57-365},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812658/},
  note = {Source identifier: 16812658}
}