Seetasarn, Jitsupa. “Factors affecting the undetectable ureteric stone in the abdominal ultrasound of patients with acute abdominal pain in the emergency room at Nan Hospital”. Journal of Nakornping Hospital 14, no. 2 (November 3, 2023): 246–258. accessed September 13, 2026. https://he01.tci-thaijo.org/index.php/jnkp/article/view/264418.