@article{SM_1988_59_1_a13,
     author = {{\DJ}inh Dung},
     title = {Approximation by trigonometric polynomials of functions of several variables on the torus},
     journal = {Sbornik. Mathematics},
     pages = {247--267},
     publisher = {mathdoc},
     volume = {59},
     number = {1},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_59_1_a13/}
}