%0 Journal Article %A B. M. Levitan %T On the work of Nikolai Nikolaevich Bogolyubov in the theory of almost periodic functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1994 %P 77-88 %V 49 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1994_49_5_a4/ %G en %F RM_1994_49_5_a4