@misc{indiciaeefe1987570de,
  title = {Extradural pethidine.},
  author = {C J Nagle and H J McQuay},
  year = {1990},
  doi = {10.1093/bja/65.5.730},
  url = {https://pubmed.ncbi.nlm.nih.gov/2101596/},
  note = {Source identifier: 2101596}
}