@misc{indiciaea780a119727c,
  title = {Heart-rate conditioning, time estimation, and arousal level: exploratory study.},
  author = {K D Marum and J Macintyre and R Armstrong},
  year = {1972},
  doi = {10.2466/pms.1972.34.1.244},
  url = {https://pubmed.ncbi.nlm.nih.gov/5011828/},
  note = {Source identifier: 5011828}
}