@article{MZM_1995_58_1_a11,
     author = {A. P. Buslaev and G. G. Magaril-Il'yaev and Nguyen Thien Nam},
     title = {Exact values of {Bernstein} widths of {Sobolev} classes of periodic functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {139--143},
     publisher = {mathdoc},
     volume = {58},
     number = {1},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_58_1_a11/}
}