@misc{indiciae359c28cd30c0,
  title = {Feedback and incentive effects on the decrease of interbeat interval.},
  author = {D W Johnston and J Lethem},
  year = {1983},
  doi = {10.1007/bf00998855},
  url = {https://pubmed.ncbi.nlm.nih.gov/6639977/},
  note = {Source identifier: 6639977}
}