Magnetic field topology and chemical spot distributions in the extreme Ap star HD 75049O. Kochukhov, N. Rusomarov, J. A. Valenti, H. C. Stempels, F. Snik, M. Rodenhuis, N. Piskunov, V. Makaganiuk, C. U. Keller and C. M. Johns-KrullA&A, 574 (2015) A79DOI: https://doi.org/10.1051/0004-6361/201425065
