@misc{indiciaebf41a558192b,
  title = {[Gallstone ileus].},
  author = {M Halm and H Diettrich and U Herrmann and F Trefftz},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4692554/},
  note = {Source identifier: 4692554}
}