@misc{indiciaefa50adff85f1,
  title = {Perforated duodenal ulcers.},
  author = {A L Blower and C P Armstrong},
  year = {1987},
  doi = {10.1002/bjs.1800740843},
  url = {https://pubmed.ncbi.nlm.nih.gov/3651789/},
  note = {Source identifier: 3651789}
}