@article{MZM_2021_110_3_a9,
     author = {M. Sh. Shabozov},
     title = {Inequalities between {Best} {Polynomial} {Approximants} and {Smoothness} {Characteristics} of {Functions} in~$L_2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {450--458},
     publisher = {mathdoc},
     volume = {110},
     number = {3},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_110_3_a9/}
}