@misc{indiciae9ca8947f1859,
  title = {[The arterial-end tidal CO2 partial pressure difference during anesthesia].},
  author = {F J Frei and R Konrad},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2106805/},
  note = {Source identifier: 2106805}
}