@misc{indiciae8239586e4844,
  title = {[Gallstone ileus].},
  author = {B Koch and R Krüger and M Knauf and L Schweiberer},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7297210/},
  note = {Source identifier: 7297210}
}