@misc{indiciaee445f0001c69,
  title = {Individual differences in perceived exertion assessed by two new methods.},
  author = {L E Marks and G Borg and G Ljunggren},
  year = {1983},
  doi = {10.3758/bf03202957},
  url = {https://pubmed.ncbi.nlm.nih.gov/6646971/},
  note = {Source identifier: 6646971}
}