Naulyong, Chaiyong, Tawatchai Taweemonkongsap, Sunai Leewansangtong, and Suchai Soontrapa. “Percutaneous Nephrolithotomy vs Open Pyelolithotomy for Renal Pelvis Calculi”. Siriraj Medical Journal 51, no. 7 (July 1, 1999): 506–513. accessed September 28, 2026. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/247435.