%0 Journal Article %A T. Ya. Azizov %A V. K. Kiriakidi %T Convexity and weak closedness of the image of operator balls under linear-fractional transformations %J Matematičeskie zametki %D 2000 %P 302-304 %V 67 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2000_67_2_a14/ %G ru %F MZM_2000_67_2_a14