@article{monga_2010,  title={Percutaneous nephrolithotomy for proximal ureteral calculi with severe hydronephrosis: assessment of different lithotriptors},  volume={36},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382010000200014},  DOI={10.1590/S1677-55382010000200014},  number={2},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Monga, Manoj},  year={2010},  month={Mar},  pages={226–226} }