@article{MZM_1980_27_1_a3,
     author = {S. P. Baiborodov},
     title = {Approximation of functions by {Vall\'ee-Poussin} sums},
     journal = {Matemati\v{c}eskie zametki},
     pages = {33--48},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_1_a3/}
}