@misc{indiciae12944dd0197b,
  title = {Percutaneous stone manipulation.},
  author = {P Alken and G Hutschenreiter and R Günther and M Marberger},
  year = {1981},
  doi = {10.1016/s0022-5347(17)55073-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/7218439/},
  note = {Source identifier: 7218439}
}