Masood, Y., N. Iqbal, R. M. Farooq, S. Iqbal, and F. Khan. “Intraoperative Flexible nephroscopy during percutaneous nephrolithotomy: An 8 years’ Experience”. Pakistan Journal of Medical Sciences, Vol. 37, no. 3, Mar. 2021, doi:10.12669/pjms.37.3.3565.