%0 Journal Article %A M. Sh. Shabozov %A A. A. Shabozova %T Sharp inequalities of Jackson-Stechkin type for periodic functions in $L_2$ differentiable in the Weyl sense %J Trudy Instituta matematiki i mehaniki %D 2019 %P 255-264 %V 25 %N 4 %U http://geodesic.mathdoc.fr/item/TIMM_2019_25_4_a26/ %G ru %F TIMM_2019_25_4_a26