@article{IVM_1969_5_a11,
     author = {Yu. M. Shmandin},
     title = {On the question of the approximation of functions by de la {Vall\'ee-Poussin} means},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {85--98},
     publisher = {mathdoc},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_5_a11/}
}