@article{TRSPY_1971_109_a2,
     author = {S. B. Stechkin},
     title = {The approximation of continuous periodic functions by {Favard} sums},
     journal = {Informatics and Automation},
     pages = {26--34},
     publisher = {mathdoc},
     volume = {109},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_109_a2/}
}