Sajid, M. T., M. Ameen, B. Murtaza, M. S. Alvi, Z. Khan, and F. Kiani. “Comparison of Mean Operative Time in Patients undergoing Ho: YAG Laser Lithotripsy and Pneumatic Lithotripsy in Ureterorenoscopy for Ureteric Calculus”. Pakistan Journal of Medical Sciences, Vol. 37, no. 2, Feb. 2021, doi:10.12669/pjms.37.2.3049.