@article{DE_1996_32_1_a14,
     author = {E. I. Moiseev},
     title = {On the differential properties of expansions in a system of sines and cosines},
     journal = {Differencialʹnye uravneni\^a},
     pages = {117--126},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_1_a14/}
}