@misc{indiciaeff05d054845e,
  title = {Cracking urinary bladder stones.},
  author = {M J Tidd},
  year = {1977},
  doi = {10.1136/bmj.2.6084.458},
  url = {https://pubmed.ncbi.nlm.nih.gov/890349/},
  note = {Source identifier: 890349}
}