@misc{indiciaea0ceaa79d907,
  title = {Non-opaque calculus demonstrated by computerized tomography.},
  author = {A J Alter and D T Peterson and A C Plautz},
  year = {1979},
  doi = {10.1016/s0022-5347(17)56563-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/501832/},
  note = {Source identifier: 501832}
}