%0 Journal Article %A I. A. Vainshtein %A M. A. Kreines %T Sequences of functions of the form $f(X(x)+Y(y))$ %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1960 %V 15 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1960_15_4_a6/ %G ru %F RM_1960_15_4_a6