Laohavichitra, K., and T. Ratanachu-ek. “Clinical Efficacy of Endoscopic Ultrasound-Guided Fine Needle Aspiration (EUS-FNA) Performing in Upper Abdomen: A Single Center Experience”. The Thai Journal of Surgery, vol. 39, no. 1, Mar. 2018, pp. 30-37, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/219934.