%0 Journal Article %A È. M. Muhamadiev %T Investigations in the theory of bounded and periodic solutions of differential equations %J Matematičeskie zametki %D 1981 %P 443-460 %V 30 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1981_30_3_a11/ %G ru %F MZM_1981_30_3_a11