@misc{indiciae39757696ce05,
  title = {Modified occlusion tests for the Bain breathing system.},
  author = {P J Heath and L F Marks},
  year = {1991},
  doi = {10.1111/j.1365-2044.1991.tb09412.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2014900/},
  note = {Source identifier: 2014900}
}