@article{DAN_1992_323_2_a1,
     author = {A. P. Buslaev},
     title = {Bernstein--Nikol'skii inequalities and widths of {Sobolev} classes of functions},
     journal = {Doklady Akademii Nauk},
     pages = {202--205},
     publisher = {mathdoc},
     volume = {323},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_323_2_a1/}
}