%0 Journal Article %A V. S. Balaganskii %T On the Continuity of the Sharp Constant in the Jackson--Stechkin Inequality in the Space~$L^2$ %J Matematičeskie zametki %D 2013 %P 13-28 %V 93 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2013_93_1_a1/ %G ru %F MZM_2013_93_1_a1