@misc{indiciaecffdc7c5c0e8,
  title = {On measuring heart rate during exercise.},
  author = {S Zinkgraf and W G Squires and M Maneval},
  year = {1983},
  url = {https://pubmed.ncbi.nlm.nih.gov/6632861/},
  note = {Source identifier: 6632861}
}