@misc{indiciaead297f805a10,
  title = {Comparing preference and resistance to change in constant- and variable-duration schedule components.},
  author = {R C Grace and J A Nevin},
  year = {2000},
  doi = {10.1901/jeab.2000.74-165},
  url = {https://pubmed.ncbi.nlm.nih.gov/11029021/},
  note = {Source identifier: 11029021}
}