@misc{indiciae5c0d9273f235,
  title = {Bifocal demand pacing.},
  author = {C A Castillo and B V Berkovits and A Castellanos and L Lemberg and G Callard and J R Jude},
  year = {1971},
  doi = {10.1378/chest.59.4.360},
  url = {https://pubmed.ncbi.nlm.nih.gov/5551579/},
  note = {Source identifier: 5551579}
}