%0 Journal Article %A A. I. Yablonskii %T The qualitative behavior of the trajectories of a certain class of differential systems %J Differencialʹnye uravneniâ %D 1971 %P 279-285 %V 7 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_2_a9/ %G ru %F DE_1971_7_2_a9