@article{MZM_1993_54_6_a9,
     author = {R. M. Trigub},
     title = {Direct theorems on approximation of smooth functions by algebraic polynomials on a segment},
     journal = {Matemati\v{c}eskie zametki},
     pages = {113--121},
     publisher = {mathdoc},
     volume = {54},
     number = {6},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_54_6_a9/}
}