1. Tepeler A, Bozkurt OF, Resorlu B, Silay MS, Ozyuvali E, Ersoz C, et al. Is the percutaneous nephrolithotomy procedure complicated in patients with anterior caliceal stones? Urol Int. 2013;90(4):389–93.
2. El-Shazly M, Aziz M, Omar M, Al-Hunaidi O, El-Nahas AR. Management of anterior caliceal stones >15 mm. Urolithiasis. 2016;44(4):377–81.
3. Kalkanli A, Cilesiz NC, Fikri O, Ozkan , A, Gezmis CT, Aydin M, et al. Impact of anterior kidney calyx involvement of complex stones on outcomes for patients undergoing percutaneous nephrolithotomy. Urol Int. 2020;104(5–6):459–64.
4. Tefekli A, Esen T, Olbert PJ, Tolley D, Nadler RB, Sun YH, et al. Isolated upper pole access in percutaneous nephrolithotomy: a large-scale analysis from the CROES percutaneous nephrolithotomy global study. J Urol. 2013;189(2):568–73.
5. Soares RMO, Zhu A, Talati VM, Nadler RB. Upper pole access for prone percutaneous nephrolithotomy: advantage or risk? Urology. 2019;134:66–71.