Nihat OKÇU, Bekir SAMİ UYANIK, Ersin AKARSU, Ebubekir BAKAN, and H. Zeki TONBUL, “The importance of carbonhydrate antigens (CA 19-9, CA 125), carcinoembriyonic antigen (CEA) and alkaline phosphatase (AP) in patients with gastric and colorectal cancer”, Turkish Journal of Gastroenterology, vol. 6, no. 4, pp. 467–471, Apr. 2020.