@article{TRSPY_1961_62_a1,
     author = {S. B. Stechkin},
     title = {The approximation of periodic functions by {Fej\'er} sums},
     journal = {Informatics and Automation},
     pages = {48--60},
     publisher = {mathdoc},
     volume = {62},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1961_62_a1/}
}