@misc{indiciae04e696e1fdbe,
  title = {[Rationalization and optimation of the step test using a simple electronic method].},
  author = {K D Hüllemann and H Brinkhus},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5571614/},
  note = {Source identifier: 5571614}
}