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 May 21, 2024. https://he01.tci-thaijo.org/index.php/jnkp/article/view/264418.