Tract-based spatial statistics: Voxelwise analysis of multi-subject diffusion data - Smith, SM; Jenkinson, M; Johansen-Berg, H; Rueckert, D; Nichols, TE; Mackay, CE; Watkins, KE; Ciccarelli, O; Cader, MZ; Matthews, PM; Behrens, TEJ (NEUROIMAGE, 2006)