Kangchareonsombat, Wisoot, Patric Villacuna, Vincent G Bird, Charles M Lynne, and Raymond J Leveillec. “Upper Pole versus Lower Pole Access for Percutaneous Nephrolithotomy (PCNL) in Patients with Multiple Renal Calculi”. Vajira Medical Journal : Journal of Urban Medicine 50, no. 1 (September 26, 2011): 21–25. accessed April 22, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/268.