@misc{indiciaef327757724e4,
  title = {Gallstone ileus revealed by endoscopy.},
  author = {P Tauris},
  year = {1977},
  doi = {10.1055/s-0028-1098500},
  url = {https://pubmed.ncbi.nlm.nih.gov/891480/},
  note = {Source identifier: 891480}
}