@misc{indiciae69c21e46e9e4,
  title = {Recurrent gallstone ileus.},
  author = {S Ulreich and J Massi},
  year = {1979},
  doi = {10.2214/ajr.133.5.921},
  url = {https://pubmed.ncbi.nlm.nih.gov/115285/},
  note = {Source identifier: 115285}
}