@article{DAN_1988_299_3_a8,
     author = {Nguen Tu Tkhan'},
     title = {Approximation of functions by polynomials on sets with a multiply
},
     journal = {Doklady Akademii Nauk},
     pages = {555--558},
     publisher = {mathdoc},
     volume = {299},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_299_3_a8/}
}