Doppler Imaging of the Ap star ϵ Ursae Majoris: Ca, Cr, Fe, Mg, Mn, Ti, Sr T. Lueftinger, R. Kuschnig, N. E. Piskunov and W. W. Weiss A&A, 406 3 (2003) 1033-1042 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20030771