Ushakova, Galyna, et al. “Non-Invasive Markers of Hepatic Encephalopathy under Chronic Hepatitis C And2-Oxoglutarate Treatment”. Current Issues in Pharmacy and Medical Sciences, vol. 23, no. 3, Sept. 2010, pp. 203-6, https://czasopisma.umlub.pl/curipms/article/view/2921.