@misc{indiciaeebfc56061f86,
  title = {[Training on the bicycle ergometer in middle age--a 10 week performance study].},
  author = {W Kypke and W Ehrenstein},
  year = {1970},
  url = {https://pubmed.ncbi.nlm.nih.gov/5522049/},
  note = {Source identifier: 5522049}
}