Stereotactic-Guided Microsurgical Removal of Lesions without Cortical Appearance Planned by Three-Dimensional CT Reconstruction: Limits and Advantages of the Frame-Based Technique - Callovini, G M; Sherkat, S; Rinaldi, A; Santucci, N; Gazzeri, G (min - Minimally Invasive Neurosurgery, 1998)