@misc{indiciaec330910a663b,
  title = {Transtracheal ventilation.},
  author = {W E Spoerel and P S Narayanan and N P Singh},
  year = {1971},
  doi = {10.1093/bja/43.10.932},
  url = {https://pubmed.ncbi.nlm.nih.gov/4940054/},
  note = {Source identifier: 4940054}
}