%0 Journal Article %A V. E. Slyusarchuk %T Some additions to the theory of stability of systems in the first approximation %J Matematičeskie zametki %D 1983 %P 595-603 %V 33 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1983_33_4_a10/ %G ru %F MZM_1983_33_4_a10