@article{IM2_1983_20_1_a10,
     author = {V. N. Temlyakov},
     title = {Approximation of functions with a~bounded mixed difference by trigonometric polynomials, and the widths of some classes of functions},
     journal = {Izvestiya. Mathematics },
     pages = {173--187},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1983_20_1_a10/}
}