@misc{indiciae5961ac315f2f,
  title = {Concurrent variable-interval schedule performance: Fixed versus mixed reinforcer durations.},
  author = {M Davison and I Hogsden},
  year = {1984},
  doi = {10.1901/jeab.1984.41-169},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812365/},
  note = {Source identifier: 16812365}
}