%0 Journal Article %A A. A. Martynyuk %T Boundedness of solutions of nonlinear systems with small %J Doklady Akademii Nauk %D 1991 %P 1055-1058 %V 317 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1991_317_5_a6/ %G ru %F DAN_1991_317_5_a6