Analysis of Surgical Management of Calvarial Tumours and First Results of a Newly Designed Robotic Trepanation System - Engelhardt, M; Bast, P; Jeblink, N; Lauer, W; Popovic, A; Eufinger, H; Scholz, M; Christmann, A; Harders, A; Radermacher, K; Schmieder, K (min - Minimally Invasive Neurosurgery, 2006)