ÜSTÜNDAĞ, Yücel. Covering the Cover. Turkish Journal of Gastroenterology, [S. l.], v. 28, n. 6, p. 429–431, 2017. DOI: 10.5152/tjg.2017.161017. Disponível em: https://www.turkjgastroenterol.org/index.php/tjg/article/view/3125. Acesso em: 1 jan. 2026.