@article{EMJ_2017_8_2_a5,
     author = {E. P. Ushakova},
     title = {Alternative boundedness characteristics for the {Hardy{\textendash}Steklov} operator},
     journal = {Eurasian mathematical journal},
     pages = {74--96},
     year = {2017},
     volume = {8},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2017_8_2_a5/}
}