%0 Journal Article %A G. A. Leonov %A V. A. Teshev %T A frequency criterion for the stability of systems of differential equations with hysteresis functions %J Differencialʹnye uravneniâ %D 1987 %P 718-719 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1987_23_4_a21/ %G ru %F DE_1987_23_4_a21