@article{DAN_1994_334_1_a4,
     author = {V. L. Makarov and V. V. Khlobystov},
     title = {Raising the accuracy of approximations of polynomial operators in},
     journal = {Doklady Akademii Nauk},
     pages = {20--22},
     publisher = {mathdoc},
     volume = {334},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_334_1_a4/}
}