@misc{indiciae932bfefb9d8e,
  title = {Regular decline in physical working capacity with age.},
  author = {L E Böttiger},
  year = {1973},
  doi = {10.1136/bmj.3.5874.270},
  url = {https://pubmed.ncbi.nlm.nih.gov/4723467/},
  note = {Source identifier: 4723467}
}