@article{prando_2011,  title={Urinary calculi composed of uric acid, cystine, and mineral salts: differentiation with dual-energy CT at a radiation dose comparable to that of intravenous pyelography},  volume={37},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382011000100020},  DOI={10.1590/S1677-55382011000100020},  number={1},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Prando, Adilson},  year={2011},  month={Jan},  pages={120–121} }