@misc{indiciaefdea873b020e,
  title = {A simple automatic respirator.},
  author = {J S Milledge},
  year = {1967},
  doi = {10.1016/s0140-6736(67)92657-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4164777/},
  note = {Source identifier: 4164777}
}