%0 Journal Article %A Yu. N. Bibikov %T A certain critical case in the theory of stability of motion %J Differencialʹnye uravneniâ %D 1973 %P 2123-2135 %V 9 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_12_a0/ %G ru %F DE_1973_9_12_a0