Hidayat, Syarif, et al. “Risk Factors for Recurrent Upper Gastrointestinal Tract Bleeding After Esophageal Varices Ligation on Patients With Liver Cirrhosis”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, vol. 5, no. 3, Jan. 2004, pp. 79-88, doi:10.24871/53200479-88.