@article{MZM_2019_105_1_a9,
     author = {V. D. Stepanov and E. P. Ushakova},
     title = {Hardy--Steklov {Operators} and the {Duality} {Principle} in {Weighted} {First-Order} {Sobolev} {Spaces} on the {Real} {Axis}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {108--122},
     publisher = {mathdoc},
     volume = {105},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2019_105_1_a9/}
}