ÖZDAL KURAN, Sedef, et al. “Secondary Prophylaxis of Esophageal Variceal Treatment: Endoscopic Sclerotherapy, Band Ligation and Combined Therapy - Long-Term Results”. Turkish Journal of Gastroenterology, vol. 17, no. 2, Jan. 2006, pp. 103-9, https://turkjgastroenterol.org/index.php/tjg/article/view/1482.