@article{MZM_2000_67_5_a1,
     author = {V. A. Baskakov},
     title = {On conditions for and the order of approximation of functions by operators of class $S_{2m}$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {654--661},
     publisher = {mathdoc},
     volume = {67},
     number = {5},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_5_a1/}
}