Ziaee, Seyyed Amir Mohsen, et al. “Extracorporeal Shock Wave Lithotripsy and Transureteral Lithotripsy in the Treatment of Impacted Lower Ureteral Calculi”. Urology Journal, vol. 3, no. 2, Mar. 2009, pp. 75-78, doi:10.22037/uj.v3i2.198.