@misc{indiciae63d34250b98e,
  title = {Influence of adaptation period length on the ability of humans to increase and decrease heart rate with instructions and biofeedback.},
  author = {D S Holmes and R O Frost and D H Bennett},
  year = {1977},
  doi = {10.1016/s0091-6773(77)90838-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/901358/},
  note = {Source identifier: 901358}
}