Euanorasetr, Chakrapan, and Weerapat Suwanthanma. “Metachronous Second Primary Colorectal Cancer in Patients with Gastric Cancer: Two Cases Report and Literature Review”. The Thai Journal of Surgery 32, no. 1 (March 31, 2011): 35–40. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/249033.