@article{MZM_2004_76_5_a2,
     author = {E. E. Berdysheva},
     title = {Optimal {Set} of the {Modulus} of {Continuity} in the {Sharp} {Jackson} {Inequality} in the {Space} $L_2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {666--674},
     publisher = {mathdoc},
     volume = {76},
     number = {5},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_76_5_a2/}
}