@misc{indiciaedb0f78a5cdea,
  title = {Heart rate variability and work-load measurement.},
  author = {W Rohmert and W Laurig and U Philipp and H Luczak},
  year = {1973},
  doi = {10.1080/00140137308924480},
  url = {https://pubmed.ncbi.nlm.nih.gov/4702061/},
  note = {Source identifier: 4702061}
}