@misc{indiciae5e2476aedbfb,
  title = {[Pulse rate as a performance parameter in the elderly on a low strain level].},
  author = {E Rautenberg and E Hultsch},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5160659/},
  note = {Source identifier: 5160659}
}