@misc{indiciaedaf96f3aa395,
  title = {[The solitary biliary calculus--a harmless condition?].},
  author = {C Schumann and K Nötzold},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7340186/},
  note = {Source identifier: 7340186}
}