TÜRKDOĞAN, M. Kürşat, Haluk TESTERECİ, Tahir KAHRAMAN, İlyas TUNCER, Ekrem ALGÜN, and İbrahim H. YÖRÜK. 1996. “Serum and Tissue Levels of Vitamin A and E Gastric and Esophageal Cancer”. Turkish Journal of Gastroenterology 7 (4):327-30. https://www.turkjgastroenterol.org/index.php/tjg/article/view/740.