@misc{indiciae1e220af851dd,
  title = {Physical working capacity and age.},
  author = {L E Böttiger},
  year = {1971},
  doi = {10.1111/j.0954-6820.1971.tb07443.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5149262/},
  note = {Source identifier: 5149262}
}