@misc{indiciaeafa031ca94ba,
  title = {Gallstone ileus.},
  author = {M S Cappell},
  year = {1987},
  doi = {10.1007/bf01297065},
  url = {https://pubmed.ncbi.nlm.nih.gov/3816489/},
  note = {Source identifier: 3816489}
}