@article{DE_1974_10_12_a12,
     author = {L. D. Kudryavtsev},
     title = {Functions whose limit values are trigonometric polynomials},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2223--2241},
     publisher = {mathdoc},
     volume = {10},
     number = {12},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_12_a12/}
}