@misc{indiciaef335e8f1dea0,
  title = {[A correct morphological and structural classification of biliary calculi].},
  author = {F Colombo and M Bocca and C Chiappa and C Invernizzi and G Perrone and C Cardella and P Corrada},
  year = {1985},
  url = {https://pubmed.ncbi.nlm.nih.gov/4069418/},
  note = {Source identifier: 4069418}
}