@article{TM_1988_181_a8,
     author = {G. G. Magaril-Il'yaev},
     title = {Trigonometric widths of {Sobolev} classes of functions on~$\boldsymbol R^n$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {147--155},
     publisher = {mathdoc},
     volume = {181},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1988_181_a8/}
}