@misc{indiciae20f2c0dd67d0,
  title = {Quantitative and selective bronchial clearance studies using 99 mTc-sulfate particles.},
  author = {H Matthys and M Müller and N Konietzko},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4534920/},
  note = {Source identifier: 4534920}
}