Xue, Shao-wei, Ming-bo Zhang, Yu-kun Luo, Nan Li, and Shang-yi Shi. “A Comparative Study of Ultrasound-Guided Percutaneous Nephrolithotripsy and X-Ray-Guided Percutaneous Nephrolithotripsy in the Treatment of Complex Renal Calculi Without Hydronephrosis”. Pakistan Journal of Medical Sciences 38, no. 8 (October 15, 2022). Accessed June 13, 2024. https://pjms.org.pk/index.php/pjms/article/view/5904.