@article{yang_sheng_2017,  title={Gas surrounding the urinary bladder in emphysematous cystitis},  volume={43},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-5538.IBJU.2016.0555},  DOI={10.1590/S1677-5538.IBJU.2016.0555},  number={6},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Yang, Zhenyu and Sheng, Chang},  year={2017},  month={Nov},  pages={1190–1191} }