@misc{indiciaea7c2d937024b,
  title = {Biofeedback heart rate training during exercise.},
  author = {D S Goldstein and R S Ross and J V Brady},
  year = {1977},
  doi = {10.1007/bf00998662},
  url = {https://pubmed.ncbi.nlm.nih.gov/901849/},
  note = {Source identifier: 901849}
}