%0 Journal Article %A V. D. Stepanov %A E. P. Ushakova %T Hardy--Steklov Operators and the Duality Principle in Weighted First-Order Sobolev Spaces on the Real Axis %J Matematičeskie zametki %D 2019 %P 108-122 %V 105 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2019_105_1_a9/ %G ru %F MZM_2019_105_1_a9