Contrast-Enhanced Sonography for the Characterisation of Hepatocellular Carcinomas - Correlation with Histological Differentiation - Strobel, D; Kleinecke, C; Hänsler, J; Frieser, M; Händl, T; Hahn, E G; Bernatik, T (Ultraschall in der Medizin - European Journal of Ultrasound, 2005)