Modelling the light variability of the Ap star ε Ursae Majoris D. Shulyak, J. Krtička, Z. Mikulášek, O. Kochukhov and T. Lüftinger A&A, 524 (2010) A66 Published online: 24 November 2010 DOI: 10.1051/0004-6361/201015094