%0 Journal Article %A V. F. Gaposhkin %T Systems of the form $\{\varphi_k(n_k{x})\}$ equivalent to systems of independent functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1967 %V 22 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1967_22_1_a19/ %G ru %F RM_1967_22_1_a19