Kusnanto, Paulus, et al. “Non-Endoscopic Examination As Predictor of Varices Degree in Liver Cirrhosis Patients Who Have Experienced Esophageal Variceal Bleeding”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, vol. 12, no. 1, Jan. 2011, pp. 15-22, doi:10.24871/121201115-22.