@misc{indiciaefe559443e47a,
  title = {[Respiratory therapy in obstructive ventilatory disorders].},
  author = {G Siemon and P V Smekal and H Ehrenberg},
  year = {1970},
  url = {https://pubmed.ncbi.nlm.nih.gov/5523804/},
  note = {Source identifier: 5523804}
}