@misc{indiciaedca4d881ef0b,
  title = {Butorphanol anesthesia.},
  author = {M Lippmann and M S Mok and S S Steen},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7201263/},
  note = {Source identifier: 7201263}
}