@article{MZM_2001_70_3_a1,
     author = {S. B. Vakarchuk},
     title = {On {Best} {Polynomial} {Approximations} in $L_2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {334--345},
     publisher = {mathdoc},
     volume = {70},
     number = {3},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_3_a1/}
}