@misc{indiciaec8b9de86cdcb,
  title = {Automatic non-rebreathing valve circuits: some principles and modifications.},
  author = {S N STEEN and J L CHEN},
  year = {1963},
  doi = {10.1093/bja/35.6.379},
  url = {https://pubmed.ncbi.nlm.nih.gov/13983579/},
  note = {Source identifier: 13983579}
}