@article{MZM_1995_57_1_a2,
     author = {S. B. Vakarchuk},
     title = {Best linear methods of approximation and widths of classes of analytic functions in a disk},
     journal = {Matemati\v{c}eskie zametki},
     pages = {30--39},
     publisher = {mathdoc},
     volume = {57},
     number = {1},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_57_1_a2/}
}