BOZ, A. (2005) “The value of serum zinc, copper, ceruloplasmin levels in patients with gastrointestinal tract cancers”, Turkish Journal of Gastroenterology, 16(2), pp. 81–84. Available at: https://www.turkjgastroenterol.org/index.php/tjg/article/view/1415 (Accessed: 1 January 2026).