@misc{indiciae38ea5c096a3e,
  title = {[Gallstone ileus].},
  author = {J B Puylaert and S D van der Werf and B C de Vries},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3550488/},
  note = {Source identifier: 3550488}
}