@misc{indiciae3770b192a9db,
  title = {Variable-ratio versus variable-interval schedules: response rate, resistance to change, and preference.},
  author = {J A Nevin and Randolph and S Holland and A P McLean},
  year = {2001},
  doi = {10.1901/jeab.2001.76-43},
  url = {https://pubmed.ncbi.nlm.nih.gov/11516115/},
  note = {Source identifier: 11516115}
}