@misc{indiciae84b2dd9ecc1c,
  title = {Malfunction of Ambu-E valve.},
  author = {K J Christensen and T Rosendal},
  year = {1984},
  doi = {10.1111/j.1365-2044.1984.tb07247.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6703302/},
  note = {Source identifier: 6703302}
}