@misc{indiciae1961f578ce13,
  title = {Multi-mode switchable breathing systems.},
  author = {G P Ramayya},
  year = {1985},
  doi = {10.1111/j.1365-2044.1985.tb10968.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4025786/},
  note = {Source identifier: 4025786}
}