Piamanant, P. “Efficacy and safety of percutaneous nephrolithotomy using the Triangular technique, accessing the upper pole of the kidney through a subcostal incision for urinary tract stone removal”. Journal of Nakornping Hospital, vol. 16, no. 1, Mar. 2025, pp. 93-107, https://he01.tci-thaijo.org/index.php/jnkp/article/view/273424.