@misc{indiciaeb5aad7e15e60,
  title = {[Gallstone ileus].},
  author = {E Helwing and D Jung},
  year = {1977},
  doi = {10.1055/s-0028-1105591},
  url = {https://pubmed.ncbi.nlm.nih.gov/598291/},
  note = {Source identifier: 598291}
}