Khan, M, M Lal, D Par Kash, M Hussain, and S Rizvi. 2016. “Anatomical Factors Predicting Lower Calyceal Stone Clearance After Extracorporeal Shockwave Lithotripsy”. African Journal of Urology 22 (2):96-100. https://doi.org/10.1016/j.afju.2015.09.006.