%0 Journal Article %A E. I. Moiseev %T On the differential properties of expansions in a system of sines and cosines %J Differencialʹnye uravneniâ %D 1996 %P 117-126 %V 32 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1996_32_1_a14/ %G ru %F DE_1996_32_1_a14