@misc{indiciaebc756d9f52f8,
  title = {[Internal biliary fistulas in cholelithiasis].},
  author = {P A Ivanov and A S Kogan},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5658271/},
  note = {Source identifier: 5658271}
}