Doppler images of II Pegasi for 2004–2010T. Hackman, M. J. Mantere, M. Lindborg, I. Ilyin, O. Kochukhov, N. Piskunov and I. TuominenA&A, 538 (2012) A126DOI: https://doi.org/10.1051/0004-6361/201117603