@misc{indiciae012304dec873,
  title = {Peroral direct cholangioscopy (PDCS) using routine straight-view endoscope: first report.},
  author = {Y Urakami and E Seifert and H Butke},
  year = {1977},
  doi = {10.1055/s-0028-1098481},
  url = {https://pubmed.ncbi.nlm.nih.gov/862583/},
  note = {Source identifier: 862583}
}